technical data YAMAHA YFM90R 2009 Owners Manual

8-3
Periodic maintenance chart for the emission control system TIPFor ATVs not equipped with an odometer or an hour meter, follow the month maintenance intervals.For ATVs equipped with an odometer or an hour meter, follow the km (mi) or hours maintenance inter-
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 MAINTENANCE
JOB INITIAL
EVERY
Whichev- er comes rst month 1 3 6 6 12
km
(mi) 320
(200) 1300
(800) 2500
(1600) 2500
(1600) 5000
(3200)
hours 20 80 160 160 3201 *Fuel line
Check fuel hoses for cracks or other damage, and
replace if necessary. √ √ √
2 Spark plugCheck condition and clean, regap, or replace if
necessary. √ √ √ √ √
3 *ValvesCheck valve clearance and adjust if necessary.
√√ √ √
4 *CarburetorCheck choke operation and correct if necessary.Check engine idling speed and adjust if neces-
sary. √ √ √ √
5 *
Crankcase breather
systemCheck breather hose for cracks or other damage,
and replace if necessary. √ √ √
8
vals. However, keep in mind that if the ATV isn’t used for a long period of time, the month maintenance