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CHK
ADJ
EBS00029
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.
EBU21742
PERIODIC MAINTENANCE CHART FOR THE EMISSION CONTROL
SYSTEM
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.
• Items marked with an asterisk should be performed by a Yamaha dealer as they require special
tools, data and technical skills.
NO.
ITEM
CHECK OR MAINTE-
NANCE JOB
INITIAL
EVERY
Whichever
comes first
month
1
3
6
6
12
km (mi)
320
(200)
1300
(800)
2500
(1600)
2500
(1600)
5000
(3200)
hours
20
80
160
160
320
1
*
Fuel line
• Check fuel hoses for cracks or other damage, and
replace if necessary.
√
√
√
2
Spark plug
• Check condition and clean, regap, or replace if nec-
essary.
√
√
√
√
√
3
*
Valves
• Check valve clearance and adjust if necessary.
√
√
√
√
4
*
Fuel injection
• Check and adjust engine idle speed.
√
√
√
√
√
5
*
Crankcase
breather system
• Check breather hose for cracks or other damage,
and replace if necessary.
√
√
√
6
*
Exhaust system
• Check for leakage and replace gasket(s) if neces-
sary.
• Check for looseness and tighten all screw clamps
and joints if necessary.
√
√
√
7
Spark arrester
• Clean.
√
√
√
INTRODUCTION/PERIODIC MAINTENANCE CHART
FOR THE EMISSION CONTROL SYSTEM
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