Yamaha YFM250X 2002, Supplementary Service Manual

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CHK
ADJ
INTRODUCTION/PERIODIC MAINTENANCE/
LUBRICATION INTERVALS
EB300000
PERIODIC CHECKS AND ADJUSTMENTS
INTRODUCTION
This chapter includes all information necessary to perform recommended inspections and adjust-
ments. These preventive maintenance procedures, if followed, will ensure more reliable vehicle
operation and a longer service life. The need for costly overhaul work will be greatly reduced. This
information applies to vehicles already in service as well as to new vehicles that are being prepared
for sale. All service technicians should be familiar with this entire chapter.
EB301000
PERIODIC MAINTENANCE/LUBRICATION INTERVALS
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
• Clean.
• Replace if necessary. Every 20 ~ 40 hours
(more often in wet or dusty areas)
Carburetor*
• Check idle speed/starter operation.
• Adjust if necessary.
Cylinder head breather
system* • Check breather hose for cracks or damage.
• Replace if necessary.
Exhaust system*
• Check for leakage.
• Retighten if necessary.
• Replace gasket if necessary.
Fuel line*
• Check fuel hose for cracks or damage.
• Replace if necessary.
Engine oil • Replace (Warm engine before draining).
Engine oil filter • Clean.
Engine oil strainer • Clean.
Final gear oil
• Check oil level/oil leakage.
• Replace.
Front brake*
• Check operation/fluid leakage/See NOTE page 13.
• Correct if necessary.
Rear brake*
• Check operation.
• Adjust if necessary.
Clutch*
• Check operation.
• Adjust if necessary.
Wheels*
• Check balance/damage/runout.
• Repair if necessary.
Wheel bearings*
• Check bearing assembly for looseness/damage.
• Replace if damaged.
Front and rear suspension*
• Check operation.
• Correct if necessary.