Chapter 3. Periodic Inspections And Adjustments; Introduction; Periodic Maintenance/Lubrication - Yamaha YFM250XL(C) Service Manual

PERIODIC MAINTENANCE/LUBRICATION

PERIODIC INSPECTIONS AND ADJUSTMENTS

INTRODUCTION

This chapter includes all information necessary to perform recommended inspections and
adjustments. These preventive maintenance procedures, if followed, will ensure more reli-
able 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
• Clean or 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 for 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 every 12 months.
• Check operation.
Brakes*
• Adjust if necessary.
• Check operation.
Clutch*
• Adjust if necessary.
• Check balance/damage/runout.
Wheels*
• Replace if necessary.
• Check bearing assembly for looseness/
Wheel bearings* damage.
• 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.
INTRODUCTION/
ROUTINE
3 - 1
INSP
ADJ
INITIAL
1 3 6
month months months
Every 20~40 hours
(More often in wet or dusty area.)
EVERY
6 1
months year
3