Adjusting The Engine Idling Speed - Yamaha WR250R Owner's Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
TIP
The sponge material should be wet but
not dripping.
Recommended oil:
Yamaha foam air filter oil or other
quality foam air filter oil
6. Pull the sponge material over the
air filter element frame.
7. Insert the air filter element into the
air filter case. NOTICE: Make sure
that the air filter element is prop-
erly seated in the air filter case.
The engine should never be op-
6
erated without the air filter ele-
ment installed, otherwise the
piston(s) and/or cylinder(s) may
become excessively
[ECA10481]
8. Place the holding clip in the origi-
nal position.
9. Close the air filter case cover, and
then install the screw.
10. Install the panel.
To clean the air filter check hose
1. Check the hose at the bottom of
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.
worn.
Adjusting the engine idling
speed
The engine idling speed must be
checked and, if necessary, adjusted as
follows.
TIP
A digital tachometer is needed to make
this adjustment.
1. Position the digital tachometer at
2. Check the engine idling speed
6-17
the ignition coil, which is located in
the spark plug cap.
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).
EAU45322