1987-1997 Yamaha Big Bear 350 4x4 service manual, Page 17Get this manual
Initial Item Valve(s) Spark plug(s) Air filter Carburetor Fuel line Engine oil Transfer gear oil Engine oil filter Engine oil strainer Final gear oil Differential gear oil Front brake Rear brake Clutch Remarks Check valve clearanceAdjust if necessaryCheck conditionClean or replace if necessaryCleanReplace if necessaryCheck idle speedstarter operationAdjust if necessaryCheck fuel hose for cracks or damageReplace if necessaryReplace (Warm engine before draining)CleanCleanCheck oil leveloil leakageReplace every 12 monthsCheck operationfluid leakageSee NOTECorrect if necessaryCheck operationAdjust if necessaryCheck operationAdjust if necessaryCheck balancedamagerunoutRepai if necessaryCheck bearings assembly for looseness damageReplace if damagedCheck operationreplace if damagedCheck toe-inadjust if necessaryCheck damageRepair or replace if necessaryCheck specific gravity, Check bearing hose Correct if necessaryCheck specific gravityCheck bearing pipe for proper operationCorrect if necessary