Periodic Checks And Adjustments; Introduction; Periodic Maintenance/Lubrication - Yamaha YFM350R-W Supplementary Service Manual

PERIODIC MAINTENANCE/LUBRICATION

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.
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) operation.
Carburetor*
• Adjust engine idling speed.
Crankcase breather • Check breather hose for cracks or damage.
system* • Replace if necessary.
• Check for leakage.
Exhaust system* • Tighten if necessary.
• Replace gasket(s) if necessary.
• Check fuel hose for cracks or damage.
Fuel line*
• Replace if necessary.
Engine oil • Replace. (Warm engine before draining.)
Engine oil filter ele- • Clean.
• Replace if necessary.
ment
Engine oil strainer • Clean.
Drive chain • Check and adjust slack/alignment/clean/lube.
• Check operation/fluid leakage/See NOTE page 21.
Brakes*
• Correct if necessary.
• Check operation.
Clutch*
• Adjust if necessary.
• Check balance/damage/runout.
Wheels*
• Replace if necessary.
• Check bearing assemblies for looseness/damage.
Wheel bearings*
• Replace if damaged.
Whichever
ROUTINE comes first
INTRODUCTION/
month 1
km 320
(mi) (200)
hours 20
– 20 –
CHK
ADJ
INITIAL
3 6
1,200 2,400 2,400
(750) (1,500) (1,500)
75 150 150
Every 20 ~ 40 hours
(More often in wet or dusty areas.)
EVERY
6 12
4,800
(3,000)
300