Periodic Checks And Adjustments; Introduction; Periodic Maintenance/Lubrication - Yamaha YFM250BT 2004 Supplementary Service Manual

PERIODIC MAINTENANCE/LUBRICATION

EB300000

PERIODIC CHECKS AND ADJUSTMENTS

INTRODUCTION

This chapter includes all information necessary to perform recommended checks and adjustments.
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.
PERIODIC MAINTENANCE/LUBRICATION
NOTE:
• For ATVs not equipped with an odometer or an hour meter, follow the month maintenance inter-
vals.
• For ATVs equipped with an odometer or an hour meter, follow the km (mi) or hours maintenance
intervals. However, keep in mind that if the ATV isn't used for a long period of time, the month
maintenance intervals should be followed.
ITEM
• Check valve clearance.
Valves*
• Adjust if necessary.
• Check condition.
Spark plug • Adjust gap and clean.
• Replace if necessary.
• Clean.
Air filter element
• Replace if necessary.
• Check starter (choke).
Carburetor*
• Adjust engine idling speed.
Cylinder head • Check breather hose for cracks or damage.
breather system* • Replace if necessary.
• Check for leakage.
Exhaust system* • Tighten if necessary.
• Replace gasket(s) if necessary.
Spark arrester • Clean.
• Check fuel hose for cracks or damage.
Fuel line*
• Replace if necessary.
Engine oil • Replace (Warm engine before draining).
Engine oil filter ele-
• Clean.
ment
Engine oil strainer • Clean.
• Check oil level/oil leakage.
Final gear oil
• Replace.
• Check operation/fluid leakage/see NOTE page 15.
Front brake*
• Correct if necessary.
• Check operation.
Rear brake*
• Adjust if necessary.
Select lever safety • Check operation.
system cable* • Adjust if necessary.
• Check operation.
Clutch*
• Adjust if necessary.
Whichever
ROUTINE
comes first
– 14 –
INTRODUCTION/
INITIAL
month 1 3
km 320 1,200
(mi) (200) (750)
hours 20 75
Every 20–40 hours
(more often in wet or dusty areas)
CHK
ADJ
EVERY
6 6 12
2,400 2,400 4,800
(1,500) (1,500) (3,000)
150 150 300