Periodic Inspections And Adjustments; Introduction; Periodic Maintenance/Lubrication - Yamaha YFM250XN 2001 Supplementary Service Manual

PERIODIC MAINTENANCE/LUBRICATION

PERIODIC INSPECTIONS 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 machine
operation and a longer service life. In addition, the need for costly overhaul work will be greatly
reduced. This information applies to machines already in service as well as new machines that are
being prepared for sale. All service technicians should be familiar with this entire chapter.
PERIODIC MAINTENANCE/LUBRICATION
ITEM
• Check valve clearance.
Valves*
• Adjust if necessary.
• Check condition.
Spark plug • Adjust gap and clean.
• Replace if necessary.
• Clean.
Air filter
• Replace if necessary.
• Check idle speed/starter operation.
Carburetor*
• Adjust if necessary.
Cylinder head • Check breather hose for cracks or damage.
breather system* • Replace if necessary.
• Check for leakage.
Exhaust system* • Retighten if necessary.
• Replace gasket if necessary.
• Check fuel hose for cracks or damage.
Fuel line*
• Replace if necessary.
Engine oil • Replace (Warm engine before draining).
Engine oil filter • Clean.
Engine oil strainer • Clean.
• Check oil level/oil leakage.
Final gear oil
• Replace.
• Check operation.
Brakes*
• Adjust if necessary.
• Check operation.
Clutch*
• Adjust if necessary.
• Check balance/damage/runout.
Wheels*
• Repair if necessary.
• Check bearing assembly for looseness/dam-
Wheel bearings* age.
• Replace if damaged.
Front and rear sus- • Check operation.
pension* • Correct if necessary.
• Check operation.
• Replace if damaged.
Steering system*
• Check toe-in.
• Adjust if necessary.
ROUTINE
– 14 –
INTRODUCTION/
INITIAL
1 3
month months
Every 20 ~ 40 hours
(more often in wet or dusty areas.)
INSP
ADJ
EVERY
6 6 1
months months year