Yamaha BIG BEAR YFM400FPS, Owner'S Manual

Page: 258 / 392

8-7
EBU00262
PERIODIC MAINTENANCE/LUBRICATION
ITEM ROUTINE
INITIAL EVERY
1
month
3
months
6
months
6
months
1
year
Valves*
• Check valve clearance.
• Adjust if necessary.
Spark plug
• Check condition.
• Adjust gap and clean.
• Replace if necessary.
Air filter element
• Clean.
• Replace if necessary. Every 20–40 hours
(More often in wet or dusty areas.)
Carburetor*
• Check starter (choke) operation.
• Adjust engine idling speed.
Crankcase breather
system* • Check breather hose for cracks or damage.
• Replace if necessary.
Exhaust system*
• Check for leakage.
• Retighten if necessary.
• Replace gasket(s) if necessary.
Fuel line*
• Check fuel hose for cracks or damage.
• Replace if necessary.
Engine oil
• Replace (Warm engine before draining).
Transfer gear oil
Engine oil filter element • Replace.
Engine oil strainer • Clean.
Final gear oil
• Check oil level/oil leakage.
• Replace every 12 months.
Differential gear oil
Front brake*
• Check operation/fluid leakage/see NOTE page 8-8.
• Correct if necessary.
Rear brake*
• Check operation.
• Adjust if necessary.
Clutch*
• Check operation.
• Adjust if necessary.
U4SH6B.book Page 7 Tuesday, May 27, 2003 4:39 PM