Adjusting The Engine Idling Speed; Checking The Throttle Cable Free Play - Yamaha WR250X Owner's Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
Adjusting the engine idling
speed
The engine idling speed must be
1 checked and, if necessary, adjusted as
follows.
2 TIP
A digital tachometer is needed to make
this adjustment.
3
1. Position the digital tachometer at
the ignition coil, which is located in
4
the spark plug cap.
2. Check the engine idling speed
5
and, if necessary, adjust it to spec-
ification by turning the idle adjust-
6
ing screw. To increase the engine
idling speed, turn the screw in di-
rection (a). To decrease the en-
7
gine idling speed, turn the screw in
direction (b).
8
9
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1. Idle adjusting screw
Engine idling speed:
1450–1650 r/min
TIP
If the specified idling speed cannot be
obtained as described above, have a
Yamaha dealer make the adjustment.
Checking the throttle cable
free play
(b)
(a)
1
1. Throttle cable free play
The throttle cable free play should mea-
sure 3.0–5.0 mm (0.12–0.20 in) at the
throttle grip. Periodically check the
throttle cable free play and, if neces-
sary, have a Yamaha dealer adjust it.
6-18
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1