9-3
9
EBU21747
Periodic maintenance chart: Emission control system
TIP
For ATVs not equipped with an odometer or an hour meter, follow the month maintenance intervals in-
stead.
For odometer or hour meter-equipped vehicles, follow the month maintenance interval if the ATV isn’t
ridden for the stated mileage or engine operating hours.
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 MAINTENANCE
JOB
INITIAL
EVERY
Whichev-
er 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
necessary.
√
√
√
√
√
3
*
Valves
• Check valve clearance and adjust if necessary.
√
√
√
√
4
*
Carburetor
• Check starter (choke) operation and correct if
necessary.
• Check engine idling speed and adjust if neces-
sary.
√
√
√
√
5
*
Crankcase breath-
er system
• Check breather hose for cracks or other damage,
and replace if necessary.
√
√
√
UBD315E0.book Page 3 Wednesday, January 15, 2020 1:18 PM
