Yamaha YFM660FS, 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
Whichever
comes first
mile
(km)
200
(320)
750
(1,200)
1,500
(2,400)
1,500
(2,400)
3,000
(4,800)
hours 20 75 150 150 300
Valves*
(See page 3-13) • Check valve clearance.
• Adjust if necessary.
Cooling system
(See page 3-31)
• Check coolant leakage.
• Repair if necessary.
• Replace coolant every 24 months.
Spark plug
(See page 3-22)
• Check condition.
• Adjust gap and clean.
• Replace if necessary.
Air filter
(See page 3-29) • Clean.
• Replace if necessary. Every 20 ~ 40 hours
(More often in wet or dusty areas.)
Carburetor*
(See page 3-16) • Check and adjust idle speed/starter operation.
• Adjust if necessary.
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.
Spark arrester
(See page 3-37)
• Clean.
Fuel line*
• Check fuel hose for cracks or damage.
• Replace if necessary.
Engine oil
(See page 3-26)
• Replace (warm engine before draining).
Engine oil filter car-
tridge
• Replace.
Final gear oil
(See page 3-48)
• Check oil level/oil leakage.
• Replace.
Differential gear oil
(See page 3-49)
Front brake*
(See page 3-39) • Check operation/fluid leakage/see NOTE page 3-2.
• Correct if necessary.
Rear brake*
(See page 3-39) • Check operation/fluid leakage/see NOTE page 3-2.
• Correct if necessary.
V-belt*
(See page 3-36) • Check operation.
• Check for cracks or damage.
Wheels*
(See page 3-56) • Check balance/damage/runout.
• Repair if necessary.
Wheel bearing*
• Check bearing assemblies for looseness/damage.
• Replace if damaged.