Adjusting The Engine Idling Speed - Yamaha WR250X 2007 Owner's Manual

the air filter case for accumulated
dirt or water.
1
1. Air filter check hose
2. If dirt or water is visible, remove
the hose, clean it, and then install
it.
PERIODIC MAINTENANCE AND MINOR REPAIR
Adjusting the engine idling
speed
The engine idling speed must be
checked and, if necessary, adjusted as
follows.
NOTE:
A diagnostic tachometer is needed to
make this adjustment.
1. Attach the tachometer to the spark
plug lead.
2. Check the engine idling speed
and, if necessary, adjust it to spec-
ification by turning the idle adjust-
ing screw. To increase the engine
idling speed, turn the screw in di-
rection (a). To decrease the en-
gine idling speed, turn the screw in
direction (b).
6-17
EAU45321
1. Idle adjusting screw
Engine idling speed:
1450–1650 r/min
NOTE:
If the specified idling speed cannot be
obtained as described above, have a
Yamaha dealer make the adjustment.
(b)
(a)
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