Yamaha 2002 YZ250FR Assembly Manual - page 24
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EAA01020
J. ADJUSTING THE ENGINE IDLING
SPEED
NOTE:
Prior to adjusting the engine idling speed,
the carburetor synchronization should be
adjusted properly, the air filter should be
clean, and the engine should have ade-
quate compression.
1. Start the engine and let it warm up for
several minutes.
2. Attach:
Dengine tachometer
(to the spark plug lead of the cylinder)
Engine tachometer
90890-03113
YU-8036-B
3. Measure:
Dengine idling speed
Out of specification > Adjust.
Engine idling speed
1,900 ~ 2,100 r/min
4. Adjust:
Dengine idling speed
a. Turn the throttle stop screw (1) in direc-
tion (a) or (b) until the specified engine
idling speed is obtained.
Direction (a)
Engine idling speed is increased.
Direction (b)
Engine idling speed is decreased.
EAA01068
K. ADJUSTING THE CLUTCH
CABLE FREE PLAY
1. Measure:
Dclutch cable free play (a)
Out of specification > Adjust.
Clutch cable free play
8 ~ 13 mm (0.31 ~ 0.51 in)
2. Adjust:
Dclutch cable free play
a. Loosen the locknuts (1).
b. Adjust the free play by changing their
tightening position.
EAA01069
L. ADJUSTING THE HOT STARTER
(CHOKE) CABLE FREE PLAY
1. Measure:
Dhot starter (choke) cable free play (c)
Out of specification > Adjust.
Hot starter (choke) cable free play
3 ~ 6 mm (0.12 ~ 0.24 in)
2. Adjust:
Dhot starter (choke) cable free play
a. Loosen the locknut (1).
b. Turn the adjusting bolt (2) in direction (a)
or (b) until the specified hot starter
(choke) cable free play is obtained.
Direction (a)
Hot starter (choke) cable free play is
increased.
Direction (b)
Hot starter (choke) cable free play is
decreased.
c. Tighten the locknut.
NOTE:
After adjustment, check proper operation of
hot starter (choke).
c. Tighten the locknuts.
NOTE:
D Make minute adjustment on the lever
side using the adjusting dial (2).
D After adjustment, check proper opera-
tion of clutch lever.