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EAS20450
PERIODIC MAINTENANCE
EAS20460
INTRODUCTION
This chapter includes all information necessary to perform recommended checks and adjustments.
If followed, these preventive maintenance procedures will ensure more reliable vehicle operation, a
longer service life and reduce the need for costly overhaul work. 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.
EAS4D3F011
PERIODIC MAINTENANCE CHART FOR THE EMISSION CONTROL SYSTEM
TIP
• 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.
• Items marked with an asterisk should be performed by a Yamaha dealer as they require special
tools, data and technical skills.
CHECK OR MAINTENANCE
NO.
ITEM
• Check fuel hoses for cracks or other damage, and replace
1 * Fuel line
if necessary.
2
Spark plug
• Check condition and clean, regap, or replace if necessary.
3 * Valves
• Check valve clearance and adjust if necessary.
• Check starter (choke) operation and correct if necessary.
4 * Carburetor
• Check engine idling speed and adjust if necessary.
Crankcase
• Check breather hose for cracks or other damage, and
5 *
breather system
replace if necessary.
• Check for leakage and replace gasket(s) if necessary.
6 * Exhaust system
• Check for looseness and tighten all screw clamps and
joints if necessary.
7
Spark arrester
• Clean.
Whichever
comes first
JOB
3-1
PERIODIC MAINTENANCE
INITIAL
month
1
3
km
320
1300
2500
(mi)
(200)
(800)
(1600)
hours
20
80
160
√
√
√
√
EVERY
6
6
12
2500
5000
(1600)
(3200)
160
320
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
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