2004 Yamaha Motorsports Grizzly 660 Auto. 4x4 Owners Manual - Page 132
2004 Yamaha Motorsports Grizzly 660 Auto. 4x4 Manual
Page 132 highlights
EBU00880 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 higher. Make sure that no foreign material enters the crankcase. Final gear oil The final gear case must be checked for oil leakage before each ride. If any leakage is found, have a Yamaha dealer check and repair the ATV. Final gear oil replacement 1. Place the machine on a level place. 2. Place a container under the final gear case to collect the used oil. 3. Remove the oil filler bolt and the drain bolt to drain the oil. 12. Start the engine and warm it up for several minutes. While warming up, check for oil leakage. If oil leakage is found, turn the engine off immediately and check for the cause. 13. Turn the engine off, and then check the oil level and correct it if necessary. 14. Install panel F. 1. Final gear case filler bolt 8-17