2011 Yamaha Motorsports Apex X-TX Owners Manual - Page 58

2011 Yamaha Motorsports Apex X-TX Manual

Page 58 highlights

Periodic maintenance and adjustment tempt to diagnose such problems yourself. Instead, take the snowmobile to a Yamaha dealer for inspection and possible repairs. You should periodically remove and inspect the spark plugs because heat and deposits will cause any spark plug to slowly break down and erode. Consult a Yamaha dealer before changing to a different type of spark plug. Specified spark plug: Manufacturer: NGK Model: CR9EB EWS00710 1. Spark plug gap 2. Spark plug reach Before installing any spark plug, measure the spark plug gap with a wire thickness gauge and adjust to specification. Spark plug gap: 0.7-0.8 mm (0.028-0.031 in) When installing the spark plug, always clean the gasket surface. Wipe off any grime from the threads and tighten the spark plug to the specified torque. Spark plug tightening torque: 13 Nm (1.3 m·kgf, 9.4 ft·lbf) ECS00382 WARNING Be sure to use the specified spark plug and spark plug cap. Otherwise, the T.O.R.S. may not work properly. Spark plugs are produced in several different thread lengths. The thread length or reach is the distance from the spark plug gasket seat to the end of the threaded portion. If the reach is too long, overheating and engine damage may result. If the reach is too short, spark plug fouling and poor performance may result. Also, if the reach is too short, carbon will form on the exposed threads resulting in combustion chamber hot spots and thread damage. Always use a spark plug with the specified reach. Spark plug reach: 19.0 mm (0.75 in) NOTICE Make sure that the spark plug caps are securely installed. Otherwise the spark plug caps could be damaged due to engine vibration. ESU11838 Adjusting the throttle lever free play 1. 2. Place the snowmobile on a level surface and apply the parking brake. Remove the shroud, the left and right side covers, and the top cover. (See page 49 for removal procedures.) Remove the headlight unit bolt on each side of the snowmobile. 3. 52

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Periodic maintenance and adjustment
52
tempt to diagnose such problems yourself.
Instead, take the snowmobile to a Yamaha
dealer for inspection and possible repairs.
You should periodically remove and inspect
the spark plugs because heat and deposits
will cause any spark plug to slowly break
down and erode. Consult a Yamaha dealer
before changing to a different type of spark
plug.
WARNING
EWS00710
Be sure to use the specified spark plug
and spark plug cap. Otherwise, the
T.O.R.S. may not work properly.
Spark plugs are produced in several different
thread lengths. The thread length or reach is
the distance from the spark plug gasket seat
to the end of the threaded portion. If the reach
is too long, overheating and engine damage
may result. If the reach is too short, spark plug
fouling and poor performance may result. Al-
so, if the reach is too short, carbon will form on
the exposed threads resulting in combustion
chamber hot spots and thread damage. Al-
ways use a spark plug with the specified
reach.
Before installing any spark plug, measure the
spark plug gap with a wire thickness gauge
and adjust to specification.
When installing the spark plug, always clean
the gasket surface. Wipe off any grime from
the threads and tighten the spark plug to the
specified torque.
NOTICE
ECS00382
Make sure that the spark plug caps are se-
curely installed. Otherwise the spark plug
caps could be damaged due to engine vi-
bration.
ESU11838
Adjusting the throttle lever free
play
1.
Place the snowmobile on a level surface
and apply the parking brake.
2.
Remove the shroud, the left and right
side covers, and the top cover. (See page
49 for removal procedures.)
3.
Remove the headlight unit bolt on each
side of the snowmobile.
Specified spark plug:
Manufacturer:
NGK
Model:
CR9EB
Spark plug reach:
19.0 mm (0.75 in)
1.
Spark plug gap
2.
Spark plug reach
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
Spark plug tightening torque:
13 Nm (1.3 m·kgf, 9.4 ft·lbf)