2006 Yamaha Motorsports Big Bear 400 4x4 Owners Manual

2006 Yamaha Motorsports Big Bear 400 4x4 Manual

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  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 1
    READ THIS MANUAL CAREFULLY! It contains important safety information. OWNER'S MANUAL YFM400FV WARNING This ATV should not be ridden by anyone under 16 years of age. LIT-11626-19-08 5FU-F8199-16
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 2
    EBU00776
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 3
    of your ATV, please consult a Yamaha dealer. AN IMPORTANT SAFETY MESSAGE: G READ THIS MANUAL TOGETHER WITH TIPS FOR THE ATV RIDER CAREFULLY AND COMPLETELY BEFORE OPERATING YOUR ATV. MAKE SURE YOU UNDERSTAND ALL INSTRUCTIONS. G PAY CLOSE ATTENTION TO THE WARNING AND CAUTION LABELS ON THE ATV. G NEVER
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 4
    INJURY OR DEATH. Particularly important information is distinguished in this manual by the following notations: The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! WARNING Failure to follow WARNING instructions could result in severe injury or death to the machine
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 5
    of manufacture. Please check your local riding laws and regulations before operating this ATV. EBU01067 AFFIX DEALER LABEL HERE YFM400FV OWNER'S MANUAL ©2005 by Yamaha Motor Corporation, U.S.A. 1st edition, February 2005 All rights reserved. Any reprinting or unauthorized use without the written
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 6
    EBU00014 WARNING Indicates a potential hazard that could result in serious injury or death. 4 CONTENTS 1 LOCATION OF THE WARNING AND SPECIFICATION LABELS...1-1 SAFETY INFORMATION...2-1 DESCRIPTION AND MACHINE IDENTIFICATION ...3-1 Identification number records...3-2 Key identification number
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 7
    Front shock absorber adjustment...4-17 Rear shock absorber adjustment...4-18 Auxiliary DC jack...4-19 5 PRE-OPERATION CHECKS ...5-1 Front and rear brakes ...5-3 Fuel ...5-5 Engine oil ...5-7 Final gear oil...5-7 Differential gear oil ...5-8 Throttle lever ...5-8 Fittings and fasteners...5-8 Lights
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 8
    terrain...7-36 Sliding and skidding ...7-38 What to do if ...7-40 What to do ...7-40 8 PERIODIC MAINTENANCE AND ADJUSTMENT...8-1 Owner's manual and tool kit...8-1 Periodic maintenance chart for the emission control system...8-3 General maintenance and lubrication chart ...8-4 Engine oil and oil
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 9
    light bulb replacement ...8-44 Troubleshooting ...8-46 Troubleshooting chart ...8-47 9 CLEANING AND STORAGE...9-1 A. Cleaning...9-1 B. Storage ...9-3 SPECIFICATIONS...10-1 NOISE REGULATION...11-1 MAINTENANCE RECORD ...12-1 ATV LIMITED WARRANTY...13-1 YAMAHA EXTENDED SERVICE (Y.E.S.) ...14-1 10 11
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 10
    EBU00464 LOCATION OF THE WARNING AND SPECIFICATION LABELS 1-1
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 11
    Read and understand all of the labels on your machine. They contain important information for safe and proper operation of your ATV. Never remove any labels from your ATV. If a label becomes difficult to read or comes off, a replacement label is available from your Yamaha dealer. 1 WARNING O ve r l
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 12
    3 WARNING O ve r l o a d i n g t h i s AT V o r c a r r y i n g c a r g o i m p r o p e r l y c a n c h a n g e h a n d l i n g , s t a b i l i t y a n d b ra k i n g p e r fo r m a n c e a n d c a n l e a d t o a n a c c i d e n t . N eve r ex c e e d t h e m a x i mu m r e a r c a r g o l i m i t
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 13
    6 7 8 1-4
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 14
    riding on hills or over obstacles, if you fail to take proper precautions. SEVERE INJURY OR DEATH can result if you do not follow these instructions: G Read this manual and all labels carefully and follow the operating procedures described. G Never operate an ATV without proper training or
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 15
    time you use it to make sure it is in safe operating condition. Always follow the inspection and maintenance procedures and schedules described in this manual. Always keep both hands on the handlebars and both feet on the footboards of the ATV during operation. Always go slowly and be extra careful
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 16
    sharply to one side. Go straight down the hill where possible. Always follow proper procedures for crossing the side of a hill as described in this manual. Avoid hills with excessively slippery or loose surfaces. Shift your weight to the uphill side of the ATV. Never attempt to turn the ATV around
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 17
    chance of skidding or sliding out of control. Never operate an ATV in fast flowing water or in water deeper than that recommended in this manual. Remember that wet brakes may have reduced stopping ability. Test your brakes after leaving water. If necessary, apply them several times to let friction
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 18
    . Never exceed the stated load capacity for an ATV. Cargo should be properly distributed and securely attached. Reduce speed and follow instructions in this manual for carrying cargo or pulling a trailer. Allow greater distance for braking. FOR MORE INFORMATION ABOUT ATV SAFETY, call the Consumer
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 19
    WARNING POTENTIAL HAZARD Improper handling of gasoline. WHAT CAN HAPPEN Gasoline can catch fire and you could be burned. HOW TO AVOID THE HAZARD Always turn off the engine when refueling. Do not refuel immediately after the engine has been running and is still very hot. Do not spill gasoline on the
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 20
    WARNING POTENTIAL HAZARD Starting or running the engine in a closed area. WHAT CAN HAPPEN Exhaust fumes are poisonous and may cause loss of consciousness and death within a short time. HOW TO AVOID THE HAZARD Always operate your ATV in an area with adequate ventilation. 2-7
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 21
    . Left handlebar switches 8 9 10 11 12 13 14 NOTE: The machine you have purchased may differ slightly from those shown in the figures of this manual. 3-1
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 22
    EBU00600 EBU00035 Identification number records Record the key identification number, vehicle identification number and model label information in the spaces provided for assistance when ordering spare parts from a Yamaha dealer or for reference in case the vehicle is stolen. 1. KEY IDENTIFICATION
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 23
    EBU00036 EBU00787 Vehicle identification number The vehicle identification number is stamped into the frame. Model label The model label is affixed to the location in the illustration. Record the information on this label in the space provided. This information will be needed to order spare parts
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 24
    EBU00039 CONTROL FUNCTIONS WARNING Indicates a potential hazard that could result in serious injury or death. EBU12490 Main switch Functions of the respective switch positions are as follows: ON: The engine can be started only at this position and the headlights, taillight and meter lighting come
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 25
    EBU00802 EBU01140 Indicator and warning lights Oil temperature warning light " " When the oil temperature reaches a specified level, this light comes on to warn that the engine oil temperature is too hot. If the light comes on during operation, stop the engine as soon as it is safe to do so and
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 26
    EBU00733 Oil temperature warning light checking method ACB-10E Turn the main switch to "ON" and the engine stop switch to " ". Oil temperature warning light does not come on. Push start switch with the transmission in neutral. Oil temperature warning light comes on. Check engine oil temperature.
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 27
    EBU00051 EBU00052 Speedometer The speedometer shows riding speed. This speedometer is equipped with an odometer and trip odometer. The trip odometer can be reset to "0" with the reset knob. Use the trip odometer to estimate how far you can ride on a tank of fuel before going to reserve. This
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 28
    EBU00053 EBU00607 Handlebar switches Start switch " " The starter motor cranks the engine when this switch is pushed. CAUTION: _ See starting instructions prior to starting the engine. (See page 6-1 for details.) _ EBU12510 1. Light switch " / /OFF" 2. Engine stop switch " / " 3. Start switch
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 29
    EBU00601 On-Command four-wheel drive switch "2WD/4WD" To change from two-wheel drive (2WD) to four-wheel drive (4WD), stop the ATV and set the switch to the 4WD position. To change from four-wheel drive (4WD) to two-wheel drive (2WD), stop the ATV and set the switch to the 2WD position. WARNING
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 30
    HAZARD Check the operation of the throttle lever before you start the engine. If it does not work smoothly, check for the cause. Correct the problem before riding the ATV. Consult a Yamaha dealer if you can't find or solve the
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 31
    EBU11590 Speed limiter The speed limiter keeps the throttle from fully opening, even when the throttle lever is pushed to the maximum. Turning in the adjusting screw limits the maximum engine power available and decreases the maximum speed of the ATV. WARNING POTENTIAL HAZARD Improper adjustment
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 32
    EBU00070 Front brake lever The front brake lever is located on the right handlebar. Pull it toward the handlebar to apply the front brake. 1. Brake pedal 1. Front brake lever EBU00732 Brake pedal and rear brake lever The brake pedal is located on the right side of the ATV and the rear brake
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 33
    EBU00074 Parking brake Use the parking brake when you have to start the engine or park the machine, especially on a slope. Apply the rear brake lever and push down the lock plate to apply the parking brake. Squeeze the rear brake lever to release the parking brake. WARNING POTENTIAL HAZARD
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 34
    EBU00084 EBU01028 Shift pedal This machine is equipped with a constantmesh 5-speed forward and 1-speed reverse transmission. The shift pedal is located on the left side of the engine. Reverse is at the bottom position. Neutral is one position above reverse. Reverse knob "REV" The reverse knob is
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 35
    EBU00590 Recoil starter Firmly grasp the handle and pull slightly until engagement can be felt. Then pull forcefully, being careful not to pull the rope all the way out. WARNING POTENTIAL HAZARD Starting the engine in gear and/or starting the engine without setting the parking brake. WHAT CAN
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 36
    EBU00092 EBU00093 Fuel tank cap Remove the fuel tank cap by turning it counterclockwise. 1. Fuel tank cap Fuel cock The fuel cock supplies fuel from the fuel tank to the carburetor. The fuel cock has three positions. OFF: With the lever in this position fuel will not flow. Always turn the lever
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 37
    EBU00095 Starter (choke) " " Starting a cold engine requires a richer air-fuel mixture. A separate starter circuit supplies this mixture. Move in direction a to turn on the starter (choke). Move in direction b to turn off the starter (choke). Refer to "Starting a cold engine" for proper operation.
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 38
    EBU00567 Seat To remove the seat, pull the seat lock lever upward and pull up the seat at the rear. 1. Seat holder (× 2) 2. Projection (× 2) 1. Seat lock lever To install the seat, insert the projections on the front of the seat into the seat holders and push down on the seat at the rear. NOTE:
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 39
    EBU00581 EBU00582 Storage box Maximum load limit: 2.0 kg (4.4 lb) Front carrier Maximum load limit: 40 kg (88 lb) CAUTION: To protect from damage, do not put metal products, like tools or sharply edged products directly in the storage box. If they must be stored, wrap them in appropriate cushion
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 40
    EBU01104 Front shock absorber adjustment The spring preload can be adjusted to suit the rider's weight and riding conditions. Adjust the spring preload as follows. To increase the spring preload, turn the adjusting ring in direction a. To decrease the spring preload, turn the adjusting ring in
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 41
    EBU01103 WARNING POTENTIAL HAZARD Improper shock absorber adjustment. WHAT CAN HAPPEN Uneven adjustment can cause poor handling and loss of stability, which could lead to an accident. HOW TO AVOID THE HAZARD Always adjust the shock absorbers on the left and right side to the same setting. Rear
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 42
    EBU01002 Standard position: B A - Minimum (soft) E - Maximum (hard) Auxiliary DC jack The auxiliary DC jack is located at the front right side of the ATV. The auxiliary DC jack can be used for suitable work lights, radios, etc. The auxiliary DC jack should only be used when the engine is running.
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 43
    CAUTION: _ G G 1. Auxiliary DC jack 2. Auxiliary DC jack cap G Do not use accessories requiring more than the above maximum capacity. This may overload the circuit and cause the fuse to blow. If accessories are used without the engine running or with the headlights turned on, the battery will
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 44
    PRE-OPERATION CHECKS Before using this machine, check the following points: ITEM Front brake Rear brake Fuel Engine oil Final gear oil/ Differential gear oil Throttle Wheels and tires Fittings and fasteners Lights and switches Axle boots ROUTINE • Check operation, free play, fluid level and fluid
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 45
    use it to make sure the ATV is in safe operating condition. Always follow the inspection and maintenance procedures and schedules described in the Owner's Manual. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 5-2
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 46
    EBU12521 Front and rear brakes Brake levers and brake pedal G Check for correct free play in the front brake lever. If the free play is incorrect, have a Yamaha dealer adjust it. G Check for correct free play in the rear brake lever and brake pedal. If the free play is incorrect, adjust it. (See
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 47
    accident. HOW TO AVOID THE HAZARD Always check the brakes at the start of every ride. Do not ride the ATV if you find any problem with the brakes. If a problem cannot be corrected by the adjustment procedures provided in this manual, have a Yamaha dealer check for the cause. 5-4
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 48
    EBU01085 Fuel Make sure there is sufficient gasoline in the tank. Recommended fuel: UNLEADED GASOLINE ONLY Fuel tank capacity: Total: 15.0 L (3.30 Imp gal, 3.96 US gal) Reserve: 4.0 L (0.88 Imp gal, 1.06 US gal) Your Yamaha engine has been designed to use regular unleaded gasoline with a pump
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 49
    does not exceed 10%. Gasohol containing methanol is not recommended by Yamaha because it may cause fuel system damage or vehicle performance problems. WARNING POTENTIAL HAZARD Improper care when refueling. WHAT CAN HAPPEN Fuel can spill, which can cause a fire and severe injury. Fuel expands
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 50
    EBU10842 EBU00493 Engine oil Make sure the engine oil is at the specified level. Add oil as necessary. (See pages 8-6- 8-10.) Final gear oil Make sure the final gear oil is at the specified level. Add oil as necessary. (See pages 8-11- 8-13 for details.) Recommended oil: SAE 80 API GL-4 Hypoid
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 51
    operation. Fittings and fasteners Always check the tightness of chassis fittings and fasteners before a ride. Take the machine to a Yamaha dealer or refer to the Service Manual for correct tightening torque. 5-8
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 52
    EBU00157 Tires WARNING POTENTIAL HAZARD Operating this ATV with improper tires, or with improper or uneven tire pressure. WHAT CAN HAPPEN Use of improper tires on this ATV, or operation of this ATV with improper or uneven tire pressure, may cause loss of control, increasing your risk of accident.
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 53
    4. Use no more than the following pressures when seating the tire beads. Front 250 kPa (2.5 kgf/cm2, 36 psi) Rear 250 kPa (2.5 kgf/cm2, 36 psi) Higher pressures may cause the tire to burst. Inflate the tires very slowly and carefully. Fast inflation could cause the tire to burst. 5-10
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 54
    EBU00159 How to measure tire pressure Use the low-pressure tire gauge. NOTE: The low-pressure tire gauge is included as standard equipment. Make two measurements of the tire pressure and use the second reading. Dust or dirt in the gauge could cause the first reading to be incorrect. Set pressure
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 55
    EBU00160 Tire wear limit When the tire groove decreases to 3 mm (0.12 in) due to wear, replace the tire. a. Tire wear limit 5-12
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 56
    familiar with all controls. WHAT CAN HAPPEN Loss of control, which could cause an accident or injury. HOW TO AVOID THE HAZARD Read the Owner's Manual carefully. If there is a control or function you do not understand, ask your Yamaha dealer. 6-1
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 57
    NOTE: G When the transmission is in neutral, the neutral indicator light should come on. If the light does not come on, ask a Yamaha dealer to inspect it. G The engine can be started in any gear if the rear brake lever is applied. However, it is recommended to shift into neutral before starting the
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 58
    NOTE: G If the engine fails to start, release the start switch, then push the start switch again. Pause a few seconds before the next attempt. Each cranking should be as short as possible to preserve battery energy. Do not crank the engine more than 10 seconds on each attempt. G If the battery is
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 59
    EBU01952 Reverse knob operation and reverse driving CAUTION: _ NOTE: When in reverse, the reverse indicator light should be on. If the light does not come on, ask a Yamaha dealer to inspect the ATV. _ _ Before shifting, stop the ATV and return the throttle lever to its closed position. Otherwise
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 60
    EBU12951 Shifting This model has a 5-speed forward and 1-speed reverse transmission with centrifugal automatic clutch. The transmission allows you to control the amount of power you have available at a given speed or for starting, accelerating, climbing hills, etc. To shift into neutral, return the
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 61
    EBU00207 4. Once the machine has attained adequate speed, release the throttle lever. 5. Shift into second gear and release the shift pedal. 6. Open the throttle gradually. 7. Follow the same procedure when shifting to the next higher gear. WARNING POTENTIAL HAZARD Opening the throttle before
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 62
    EBU02092 Engine break-in There is never a more important period in the life of your machine than the period between zero and 20 hours. For this reason, we ask that you carefully read the following material. Because the engine is brand new, you must not put an excessive load on it for the first
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 63
    EBU02111 10-20 hours: Avoid prolonged operation above 3/4 throttle. Rev the machine freely through the gears but do not use full throttle at any time. After break-in: Avoid prolonged full throttle operation. Vary speeds occasionally. Parking When parking, stop the engine and shift into first gear.
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 64
    EBU12960 Parking on a slope WARNING POTENTIAL HAZARD Parking on a hill or other incline. WHAT CAN HAPPEN The ATV could roll out of control, increasing the chance of an accident. HOW TO AVOID THE HAZARD Avoid parking on hills or other inclines. If you must park on an incline, put the ATV in low
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 65
    EBU00221 Accessories and loading EBU00222 G Accessories Accessories can affect the handling and control of your ATV. Keep the following in mind when considering an accessory or operating an ATV which has accessories. G Choose only accessories designed for your ATV. Your Yamaha dealer has a
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 66
    EBU05881 Loading Cargo or a trailer can change the stability and handling of an ATV. You must use common sense and good judgment when carrying cargo or towing a trailer. Keep the following points in mind: G Never exceed the weight limits shown. An overloaded ATV can be unstable. MAXIMUM LOADING
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 67
    G G G G Ride more slowly than you would without a load. The more weight you carry, the slower you should go. Although conditions vary, it is good practice not to exceed 2nd gear whenever you are carrying heavier loads or when towing a trailer. Allow more braking distance. A heavier vehicle takes
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 68
    EBU13451 WARNING _ Indicates a potential hazard that could result in serious injury or death. 6-13
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 69
    1- Riding Your ATV 7 7-1
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 70
    recreation. This section, Riding your ATV, provides general ATV riding instructions for recreational riding. The skills and techniques described in this 7-3 begin to ride, be sure you have read this Owner's Manual completely and understand the operation of the controls. Pay particular attention to
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 71
    the course and the operating techniques described in this Owner's Manual. For more information about the training course, contact an authorized more difficult maneuvers. WARNING POTENTIAL HAZARD Operating this ATV without proper instruction. WHAT CAN HAPPEN The risk of an accident is greatly
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 72
    Not recommended for children under 16 years of age. WARNING POTENTIAL HAZARD Failure to follow the age recommendations for this ATV. WHAT CAN HAPPEN Use by children of ATVs that are not recommended for their age can lead to severe injury or death of the child. HOW TO AVOID THE HAZARD A child under
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 73
    This ATV is designed to carry operator and cargo only - passengers prohibited. WARNING POTENTIAL HAZARD Carrying a passenger on this ATV. WHAT CAN HAPPEN Greatly reduces your ability to balance and control this ATV. Could cause an accident, resulting in harm to you and/ or your passenger. HOW TO
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 74
    Apparel WARNING POTENTIAL HAZARD Operating this ATV without wearing an approved motorcycle helmet, eye protection and protective clothing. WHAT CAN HAPPEN Operating without an approved motorcycle helmet increases your chances of a severe head injury or death in the event of an accident. Operating
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 75
    Do not operate after consuming alcohol or drugs. Operator's performance capability is reduced by the influence of alcohol or drugs. WARNING POTENTIAL HAZARD Operating this ATV after consuming alcohol or drugs. WHAT CAN HAPPEN Could seriously affect your judgment. Could cause you to react more
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 76
    . HOW TO AVOID THE HAZARD Always use the size and type tires specified in the Owner's Manual for this vehicle on pages 5-9-5-10. Always maintain proper tire pressure as described in the Owner's Manual on page 5-11. WARNING POTENTIAL HAZARD Failure to inspect the ATV before operating. Failure to
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 77
    WARNING _ Indicates a potential hazard that could result in serious injury or death. Do not operate at speeds too fast for your skills or the conditions. WARNING POTENTIAL HAZARD Operating this ATV at speeds too fast for your skills or the conditions. WHAT CAN HAPPEN Increases your chances of
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 78
    ATV. Cargo should be properly distributed and securely attached. Reduce speed when carrying cargo or pulling a trailer. Allow greater distance for braking. Always follow the instructions in your Owner's Manual for carrying cargo or pulling a trailer. 7-11
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 79
    During operation Always keep your feet on the footboards during operation. Otherwise your feet may contact the rear wheels. WARNING POTENTIAL HAZARD Removing hands from handlebars or feet from footboards during operation. WHAT CAN HAPPEN Removing even one hand or foot can reduce your ability to
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 80
    Avoid wheelies and jumping. You may lose control of the ATV or overturn. WARNING POTENTIAL HAZARD Attempting wheelies, jumps, and other stunts. WHAT CAN HAPPEN Increases the chance of an accident, including an overturn. HOW TO AVOID THE HAZARD Never attempt stunts, such as wheelies or jumps. Don't
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 81
    added to this vehicle should be genuine Yamaha or equivalent components designed for use on this ATV and should be installed and used according to instructions. If you have questions, consult an authorized ATV dealer. 7-14
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 82
    Exhaust system The exhaust system on the ATV is very hot during and following operation. To prevent burns, avoid touching the exhaust system. Park the ATV in a place where pedestrians or children are not likely to touch it. WARNING POTENTIAL HAZARD Hot exhaust system. WHAT CAN HAPPEN Dry grass or
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 83
    BE CAREFUL WHERE YOU RIDE This ATV is designed for off-road use only. Riding on paved surfaces can cause loss of control. WARNING POTENTIAL HAZARD Operating this ATV on paved surfaces. WHAT CAN HAPPEN ATVs are designed for off-road use only. Paved surfaces may seriously affect handling and control
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 84
    Do not ride on any public road, street, or highway. Riding on public roads can result in collisions with other vehicles. WARNING POTENTIAL HAZARD Operating this ATV on public streets, roads or highways. WHAT CAN HAPPEN You can collide with another vehicle. HOW TO AVOID THE HAZARD Never operate this
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 85
    Know the terrain where you ride. Ride cautiously in unfamiliar areas. Stay alert for holes, rocks, or roots in the terrain, and other hidden hazards which may cause the ATV to upset. WARNING POTENTIAL HAZARD Failure to use extra care when operating this ATV on unfamiliar terrain. WHAT CAN HAPPEN
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 86
    WARNING POTENTIAL HAZARD Failure to use extra care when operating on excessively rough, slippery or loose terrain. WHAT CAN HAPPEN Could cause loss of traction or vehicle control, which could result in an accident, including an overturn. HOW TO AVOID THE HAZARD Do not operate on excessively rough,
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 87
    When riding in an area where you might not easily be seen, such as desert terrain, mount a caution flag on the ATV. DO NOT use the flag pole bracket as a trailer hitch. WHAT CAN HAPPEN You could be in a collision. You could be injured. HOW TO AVOID THE HAZARD Always mount a caution flag on the ATV
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 88
    ATV is designed for off-road use only, and handling maneuvers are more difficult to perform on pavement. Set the parking brake and follow the instruction on page 6-1 to start the engine. Once it has warmed up you are ready to begin riding your ATV. As you get on the ATV
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 89
    CAUTION: _ WARNING POTENTIAL HAZARD Engaging a lower gear when the engine speed is too high. WHAT CAN HAPPEN The wheels could stop rotating. This could cause loss of control, an accident and injury. It could also cause engine or drive train damage. HOW TO AVOID THE HAZARD Make sure the engine has
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 90
    that this skill be learned first at low speed. HOW TO AVOID THE HAZARD Always follow proper procedures for turning as described in this Owner's Manual. Practice turning at low speeds before attempting to turn at faster speeds. Do not turn at speeds too fast for your skills or the conditions
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 91
    Once you have learned this technique you should be able to perform it at higher speeds or in tighter curves. Improper riding procedures such as abrupt throttle changes, excessive braking, incorrect body movements, or too much speed for the sharpness of the turn may cause the ATV to tip. If the ATV
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 92
    CLIMBING UPHILL Use proper riding techniques to avoid vehicle overturns on hills. Be sure that you can maneuver your ATV well on flat ground before attempting any incline and then practice riding first on gentle slopes. Try more difficult climbs only after you have developed your skill. In all cases
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 93
    of control or cause the ATV to overturn. HOW TO AVOID THE HAZARD Always follow proper procedures for climbing hills as described in this Owner's Manual. Always check the terrain carefully before you start up any hill. Never climb hills with excessively slippery or loose surfaces. Shift your weight
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 94
    AVOID THE HAZARD Never attempt to turn the ATV around on any hill until you have mastered the turning technique as described in the Owner's Manual on level ground. Be very careful when turning on any hill. Avoid crossing the side of a steep hill if possible. 7-27 When crossing the side
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 95
    If your ATV has stalled or stopped and you believe you can continue up the hill, restart carefully to make sure you do not lift the front wheels which could cause you to lose control. If you are unable to continue up the hill, dismount the ATV on the uphill side. Physically turn the ATV around and
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 96
    brake. Dismount on uphill side or to a side if pointed straight uphill. Turn the ATV around and remount, following the procedure described in the Owner's Manual. 7-29
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 97
    RIDING DOWNHILL When riding your ATV downhill, shift your weight as far to the rear and uphill side of the ATV as possible. Move back on the seat and sit with your arms straight. Engine compression will do most of the braking for you. For maximum engine compression braking effect, change to 4WD
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 98
    control or cause the ATV to overturn. HOW TO AVOID THE HAZARD Always follow proper procedures for going down hills as described in this Owner's Manual. Note: a special technique is required when braking as you go down a hill. Always check the terrain carefully before you start down any hill. Shift
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 99
    AVOID THE HAZARD Never attempt to turn the ATV around on any hill until you have mastered the turning technique as described in the Owner's Manual on level ground. Be very careful when turning on any hill. Avoid crossing the side of a steep hill if possible. 7-32
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 100
    When crossing the side of a hill: Always follow proper procedures as described in the Owner's Manual. Avoid hills with excessively slippery or loose surfaces. Shift your weight to the uphill side of the ATV. 7-33
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 101
    an accident. HOW TO AVOID THE HAZARD Never operate this ATV in fast flowing water or in water deeper than that specified in your Owner's Manual. 7-34
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 102
    Test your brakes after leaving the water. Do not continue to ride your ATV without verifying that you have regained proper braking ability. CAUTION: _ After riding your ATV in water, be sure to drain the trapped water by removing the check hose at the bottom of the air filter case. Wash the ATV in
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 103
    ride over large obstacles, such as large rocks or fallen trees. When you go over obstacles, always follow proper procedures as described in the Owner's Manual. 7-36
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 104
    SLIDING AND SKIDDING Care should be used when riding on loose or slippery surfaces since the ATV may slide. If unexpected and uncorrected, sliding could lead to an accident. To reduce the tendency for the front wheels to slide in loose or slippery conditions, positioning your weight over the front
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 105
    With practice, over a period of time, skill at controlled sliding can be developed. The terrain should be chosen carefully before attempting such maneuvers, since both stability and control are reduced. Bear in mind that sliding maneuvers should always be avoided on extremely slippery surfaces such
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 106
    WHAT TO DO IF ...This section is designed to be a reference guide only. Be sure to read each section on riding techniques completely. WHAT TO DO ...G If your ATV doesn't turn when you want it to: Bring
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 107
    G G If your ATV is traversing a sloping surface: Be sure to ride with your weight positioned towards the uphill side of the ATV to maintain proper balance. If the ATV starts to tip, steer down the hill (if there are no obstacles in your way) to regain balance. If you discover that the ATV is going
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 108
    dealer perform service if you are not familiar with machine service. EBU12990 WARNING POTENTIAL HAZARD Servicing an engine while performing maintenance unless otherwise specified. 8-1 Owner's manual and tool kit You are recommended to put this owner's manual in the vinyl bag and always carry it
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 109
    and should be installed and used according to instructions. If you have questions, consult an authorized Yamaha ATV dealer. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1. Owner's tool kit 2. Low-pressure tire gauge The service information included in this manual is intended to provide you, the owner, with
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 110
    EBU15731 Periodic maintenance chart for the emission control system NOTE: _ G G For ATVs not equipped with an odometer or an hour meter, follow the month maintenance intervals. For ATVs equipped with an odometer or an hour meter, follow the km (mi) or hours maintenance intervals. However, keep in
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 111
    EBU15720 General maintenance and lubrication chart Whichever month comes first km (mi) hours 1 320 (200) 20 INITIAL 3 1,300 (800) 80 6 2,500 (1,600) 160 EVERY 6 12 2,500 5,000 (1,600) (3,200) 160 320 ITEM ROUTINE Engine oil Engine oil filter element Engine oil strainer Final gear oil
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 112
    ITEM ROUTINE Whichever month comes first km (mi) hours 1 320 (200) 20 INITIAL 3 1,300 (800) 80 6 2,500 (1,600) 160 EVERY 6 12 2,500 5,000 (1,600) (3,200) 160 320 Axle boots* Fittings and fasteners* Lights and switches* Check operation. Replace if damaged. Check all chassis fittings and
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 113
    EBU11812 Engine oil and oil filter element The engine oil level should be checked before each ride. In addition, the oil must be changed and the oil filter element cleaned at the intervals specified in the periodic maintenance and lubrication chart. To check the engine oil level 1. Place the ATV on
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 114
    NOTE: The oil level should be between the minimum and maximum level marks. _ _ 5. If the engine oil is at or below the minimum level mark, add sufficient oil of the recommended type to raise it to the correct level. CAUTION: _ Be sure no foreign material enters the crankcase. _ To change the
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 115
    CAUTION: _ When removing the engine oil drain bolt, the compression spring, oil strainer and O-ring will fall out. Take care not to lose these parts. _ 6. Clean the oil strainer and oil filter element with solvent. 7. Check the O-ring for damage and replace it if necessary. NOTE: Skip steps 5-9
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 116
    9. Install the oil filter cover by installing the bolts, and then tighten them to the specified torque. Tightening torque: Oil filter cover bolt: 10 Nm (1.0 m·kgf, 7.2 ft·lbf) 10. Install the oil strainer, compression spring, O-ring and engine oil drain bolt. Tighten the engine oil drain bolt to the
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 117
    CAUTION: _ G G _ In order to prevent clutch slippage (since the engine oil also lubricates the clutch), do not mix any chemical additives. Do not use oils with a diesel specification of "CD" or oils of a higher quality than specified. In addition, do not use oils labeled "ENERGY CONSERVING II" or
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 118
    EBU11453 Final gear oil Checking the final gear oil 1. Place the ATV on a level surface. 2. Remove the oil filler bolt, and then check the oil level in the final gear case. NOTE: The oil level should be at the brim of the filler hole. _ _ 3. If the oil is below the brim of the filler hole, add
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 119
    Replacing the final gear oil 1. Remove the final gear case cover by removing the bolts. 2. Place the ATV on a level surface. 3. Place a container under the final gear case to collect the used oil. 4. Remove the oil filler bolt and the drain bolt to drain the oil. 1. Final gear case cover 2. Bolt
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 120
    6. Add the recommended final gear oil to the brim of the filler hole. Recommended oil: SAE 80 API GL-4 Hypoid gear oil Oil quantity: 0.23 L (0.20 Imp qt, 0.24 US qt) Tightening torque: Final gear case cover bolt: 17 Nm (1.7 m·kgf, 13 ft·lbf) CAUTION: _ Be sure no foreign material enters the final
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 121
    EBU07063 Differential gear oil Checking the differential gear oil 1. Place the ATV on a level surface. 2. Remove the differential gear oil filler bolt and check the oil level. It should be up to the brim of the filler hole. If the level is low, add sufficient oil of the recommended type to raise it
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 122
    Replacing the differential gear oil 1. Place the ATV on a level surface. 2. Place a container under the differential gear case to collect the used oil. 3. Remove the differential gear oil filler bolt and differential gear oil drain bolt to drain the oil. 4. Install the differential gear oil drain
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 123
    EBU00862 6. Install the differential gear oil filler bolt, and then tighten it to the specified torque. Tightening torque: Differential gear oil filler bolt: 23 Nm (2.3 m·kgf, 17 ft·lbf) 7. Check for oil leakage. If oil leakage is found, check for the cause. Axle boots Check the protective boots
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 124
    of the engine. For example, a very white center electrode porcelain color could indicate an intake air leak or carburetion problem for that cylinder. Do not attempt to diagnose such problems yourself. Instead, take the ATV to a Yamaha dealer. You should periodically remove and inspect the spark plug
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 125
    EBU13011 Air filter element cleaning NOTE: There is a check hose at the bottom of the air filter case. If dust or water collects in this hose, empty the hose and clean the air filter element and air filter case. _ _ 1. Air filter case cover 2. Holder (× 3) 3. Pull the air filter element out. 1.
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 126
    4. Remove the foam cover from the air filter element. WARNING POTENTIAL HAZARD Using low flash point solvents or gasoline to clean the foam cover. WHAT CAN HAPPEN Low flash point solvents or gasoline can catch fire or explode. HOW TO AVOID THE HAZARD Use parts cleaning solvent to clean the foam
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 127
    7. Tap the element lightly to remove most of the dust and dirt. Blow out the remaining dirt with compressed air as shown. If the air filter element is damaged, replace it. 8. Install the foam cover onto the air filter element. 9. Install the air filter element. 10. Install the air filter case cover
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 128
    EBU00754 CAUTION: _ Never operate the engine with the air filter element removed. This will allow unfiltered air to enter, causing rapid engine wear and possible engine damage. Additionally, operation without the air filter element will affect carburetor jetting with subsequent poor performance
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 129
    EBU00296 WARNING POTENTIAL HAZARD Improperly purging the exhaust system. Hot exhaust system. WHAT CAN HAPPEN Could injure the eyes. Could cause burns. Could cause carbon monoxide poisoning, possibly leading to death. Could start a fire. HOW TO AVOID THE HAZARD When cleaning the spark arrester:
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 130
    EBU13020 Idle speed adjustment NOTE: A diagnostic tachometer must be used for this procedure. _ _ 1. Start the engine and warm it up for a few minutes at approximately 1,000 to 2,000 r/min. Occasionally rev the engine to 4,000 to 5,000 r/min. The engine is warm when it quickly responds to the
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 131
    noise. To prevent this, the valve clearance must be adjusted regularly. This adjustment however, should be left to a professional Yamaha service technician. EBU03060 Throttle lever adjustment NOTE: Adjust the engine idling speed before adjusting the throttle lever free play. 1. Loosen the locknut
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 132
    EBU13031 EBU00313 Front brake pad check Inspect the brake pads for damage and wear. If the brake pad thickness is less than 1 mm (0.04 in), have a Yamaha dealer replace the pads as a set. Rear brake shoe inspection A wear indicator is provided on the rear brake. This indicator allows checking of
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 133
    EBU13040 Brake fluid level check Insufficient brake fluid may let air enter the brake system, possibly causing the brakes to become ineffective. Before riding, check that the brake fluid is above the minimum level mark and replenish if necessary. A low brake fluid level may indicate worn brake pads
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 134
    the cause if the brake fluid level goes down. Brake fluid replacement Complete fluid replacement should be done only by trained Yamaha service personnel. Have a Yamaha dealer replace the following components during periodic maintenance or when they are damaged or leaking. G Replace the oil seals
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 135
    check the brake system. WARNING POTENTIAL HAZARD Operating with improperly serviced or adjusted brakes. WHAT CAN HAPPEN You could lose braking ability, which could lead to an accident. HOW TO AVOID THE HAZARD After servicing: sure the brakes operate G Make smoothly and that the free play
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 136
    EBU13052 Brake pedal and rear brake lever adjustment Brake pedal free play adjustment 1. Fully loosen the adjusting nut on the brake cable. 2. Turn the adjusting nut on the brake rod until the free play is 20-30 mm (0.79- 1.18 in). a. Brake pedal free play 1. Adjusting nut (brake cable) 2.
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 137
    Brake lever free play adjustment 1. Loosen the locknut and fully turn in the adjusting bolt at the brake lever. 2. Turn in the adjusting nut on brake cable to provide a gap of 0-1 mm (0-0.04 in) between the camshaft lever and the pin. 1. Locknut 2. Adjusting bolt 1. Adjusting nut (brake cable)
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 138
    or adjusted brakes. WHAT CAN HAPPEN You could lose braking ability, which could lead to an accident. HOW TO AVOID THE HAZARD After servicing: G Make sure the brakes operate smoothly and that the free play is correct. G Make sure the brakes do not drag. Replacement of brake components requires
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 139
    EBU00834 Adjusting the rear brake light switch The rear brake light switch, which is activated by the brake pedal and brake levers, is properly adjusted when the brake light comes on just before braking takes effect. If necessary, adjust the brake light switch as follows. Turn the adjusting nut
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 140
    EBU00346 Clutch adjustment 1. Loosen the locknut. 2. Slowly turn the adjusting bolt counterclockwise until resistance is felt. Then, turn it 1/8 turn clockwise. 3. Tighten the locknut to specification. Tightening torque: 20 Nm (2.0 m·kgf, 15 ft·lbf) NOTE: Turn the adjusting bolt counterclockwise
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 141
    EBU00356 Cable inspection and lubrication WARNING POTENTIAL HAZARD Damaged control cables. WHAT CAN HAPPEN Corrosion can result when the outer covering of control cables becomes damaged. Cables can also become frayed or kinked. Operation of controls could be restricted, which could cause an
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 142
    EBU01112 EBU11211 Wheel removal 1. Loosen the wheel nuts. 2. Elevate the ATV and place a suitable stand under the frame. 3. Remove the nuts from the wheel. 4. Remove the wheel. Wheel installation 1. Install the wheel and the nuts. NOTE: G The arrow mark on the tire must point toward the rotating
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 143
    1. Tapered nut 2. Lower the ATV so that the wheel is on the ground. 3. Tighten the wheel nuts to the specified torque. Wheel nut torque: Front: 64 Nm (6.4 m·kgf, 46 ft·lbf) Rear: 55 Nm (5.5 m·kgf, 40 ft·lbf) 8-36
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 144
    EBU00380 Battery This machine is equipped with a sealed-type battery. Therefore it is not necessary to check the electrolyte or add distilled water in the battery. If the battery seems to have discharged, consult a Yamaha dealer. CAUTION: Do not try to remove the sealing caps of the battery cells.
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 145
    EBU00385 Battery maintenance 1. When the machine is not used for a month or longer, remove the battery and store it in a cool, dark place. Completely recharge the battery before reinstallation. CAUTION: A special battery charger (constant voltage/ampere or constant voltage) is required for
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 146
    EBU00853 Fuse replacement 1. The main fuse case and the fuse box are located under the seat. 2. If a fuse is blown, turn off the main switch and install a new fuse of the specified amperage. Then turn on the switches. If the fuse immediately blows again, consult a Yamaha dealer. Specified fuses:
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 147
    WARNING POTENTIAL HAZARD Using an improper fuse. WHAT CAN HAPPEN An improper fuse can cause damage to the electrical system which could lead to a fire. HOW TO AVOID THE HAZARD Always use a fuse of the specified rating. Never use a material in place of the proper fuse. CAUTION: _ To prevent
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 148
    EBU15961 Replacing a headlight bulb If a headlight bulb burns out, replace the bulb as follows. 1. Disconnect the coupler shown. 2. Remove the headlight assembly by removing the screws. 1. Screw (× 3) 4. Disconnect the headlight coupler by lifting the tab as shown and pulling out the coupler. 1.
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 149
    5. Remove the headlight bulb holder assembly by turning it counterclockwise. WARNING POTENTIAL HAZARD A headlight bulb is hot when it is on and immediately after it is turned off. WHAT CAN HAPPEN You can be burned, or a fire could start if the bulb touches something flammable. HOW TO AVOID THE
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 150
    8. Place the headlight unit in the original position, and then install the screws. 9. Place the headlight assembly in the original position, and then install the screws. 10. Connect the coupler which was disconnected in step "1". 11. Adjust the headlight beam if necessary. 1. Do not touch the glass
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 151
    EBU01089 EBU09452 Headlight beam adjustment CAUTION: _ It is advisable to have a Yamaha dealer make this adjustment. _ Tail/brake light bulb replacement 1. Open the storage box. (See page 4-16.) 2. Remove the nuts together with the washers. To raise the beam, turn the adjusting screw in
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 152
    1. Bulb holder 1. Bulb holder 2. Bulb 4. Remove the defective bulb from the bulb holder by pushing it inward and turning it counterclockwise. 5. Install a new bulb in the bulb holder by pushing it inward and turning it clockwise. 6. Install the bulb holder (together with the bulb) by turning it
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 153
    trouble may occur during operation. Any problem in the fuel, compression, or ignition systems can cause poor starting and loss of power. The troubleshooting , but they are often inferior. Consequently, they have a shorter service life and can lead to expensive repair bills. WARNING POTENTIAL HAZARD
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 154
    EBU00440 Troubleshooting chart Turn the fuel cock lever to "ON". There is fuel. 1. Fuel Check if there is fuel in the fuel tank. Some fuel. Turn the
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 155
    EBU00419 1- CLEANING AND STORAGE CAUTION: Excessive water pressure may cause water seepage and deterioration of wheel bearings, brakes, transmission seals and electrical devices. Many expensive repair bills have resulted from improper high pressure detergent applications such as those available in
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 156
    6. Clean the seat with a vinyl upholstery cleaner to keep the cover pliable and glossy. 7. Automotive type wax may be applied to all painted and chrome plated surfaces. Avoid combination cleaner-waxes. Many contain abrasives which may mar the paint or protective finish. When finished, start the
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 157
    EBU00530 B. STORAGE Long term storage (60 days or more) of your machine will require some preventive procedures to guard against deterioration. After thoroughly cleaning the machine, prepare for storage as follows: 1. Fill the fuel tank with fresh fuel and add the specified amount of Yamaha Fuel
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 158
    7. Remove the battery and charge it. Store it in a dry place and recharge it once a month. Do not store the battery in an excessively warm or cold place (less than 0 °C (30 °F) or more than 30 °C (90 °F)). NOTE: Make any necessary repairs before storing the machine. 9-4
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 159
    EBU00428 SPECIFICATIONS 1 MODEL Dimension: Overall length Overall width Overall height Seat height Wheel base Ground clearance Minimum turning radius Basic weight: With oil and full fuel tank Engine: Engine type Cylinder arrangement Displacement Bore × Stroke Compression ratio Starting system
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 160
    YAMALUBE 4 (20W40) or SAE 20W40 YAMALUBE 4 (10W30) or SAE 10W30 SAE 5W30 -20˚ -10˚ 0˚ 10˚ 20˚ 30˚ 40˚ 50˚C Recommended engine oil classification: API Service SE, SF, SG type or higher CAUTION: In order to prevent clutch slippage (since the engine oil also lubricates the clutch), do not mix
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 161
    MODEL Final gear oil: Type Quantity Differential gear oil: Type Quantity Air filter: Fuel: Type Tank capacity Reserve amount Carburetor: Type/manufacturer Spark plug: Type/manufacturer Gap Clutch type: YFM400F SAE 80 API GL-4 Hypoid gear oil 0.23 L (0.20 lmp qt, 0.24 US qt) SAE 80 API GL-4 Hypoid
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 162
    MODEL Transmission: Primary reduction system Primary reduction ratio Secondary reduction system Secondary reduction ratio Transmission type Operation Gear raito: YFM400F Spur gear 76/24 (3.166) Shaft drive 28/24 × 24/18 × 33/09 (5.703) Constant mesh 5-speed forward, 1-speed reverse Left foot
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 163
    MODEL Suspension: Front Rear Shock absorber: Front Rear Wheel travel: Front wheel travel Rear wheel travel Electrical: Ignition system Generator system Battery type/voltage, capacity Headlight type: Bulb voltage, wattage × quantity: Headlight Tail/brake light Meter lighting Indicator/warning light:
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 164
    MODEL Specified fuses: Main fuse Headlight fuse Ignition fuse Auxiliary DC jack fuse Carburetor warmer fuse Four-wheel-drive fuse 30 A 15 A 10 A 10 A 10 A 3A YFM400F 10-6
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 165
    EBU00430 NOISE REGULATION TAMPERING WITH NOISE CONTROL SYSTEM PROHIBITED: Federal law prohibits the following acts or the causing thereof: (1) The removal or rendering inoperative by any person other than for purposes of maintenance, repair, or replacement of any device or element of design
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 166
    (1,600) 5,000 (3,200) 7,500 (4,800) 10,000 (6,400) 12,500 (8,000) 15,000 (9,600) hours 20 80 160 320 480 640 800 960 DATE OF SERVICE MILEAGE SERVICING DEALER NAME AND ADDRESS REMARKS 6 7 8 9 10 11 12 13 14 17,500 (11,200) 1,120 20,000 (12,800) 1,280 22,500 (14,400
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 167
    EBU00432 YAMAHA MOTOR CORPORATION, U.S.A. ATV LIMITED WARRANTY 13-1
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 168
    1 2 3 4 5 6 7 8 9 10 9 9 13 14 13-2
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 169
    EBU00435 YAMAHA EXTENDED SERVICE (Y.E.S.) 14-1
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 170
    1 2 3 4 5 6 7 8 9 10 9 9 9 EBU00436 14 WARNING Indicates a potential hazard that could result in serious injury or death. 14-2
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 171
    EBU00437
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 172
    and control. with a passenger-passengers affect balance and steering and increase risk of losing control. LOCATE AND READ OWNER'S MANUAL. FOLLOW ALL INSTRUCTIONS AND WARNINGS. (For replacement manual, call 1-800-532-1558) NEVER operate: YAMAHA MOTOR CO., LTD. PRINTED IN USA 2005.04-1.0×1 CR (E)
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 173
  • 2006 Yamaha Motorsports Big Bear 400 4x4 | Owners Manual - Page 174
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5FU-F8199-16
LIT-11626-19-08
READ THIS MANUAL CAREFULLY!
It contains important safety information.
This ATV should not be ridden by anyone under 16 years of age.
WARNING
YFM400FV
OWNER’S MANUAL