Checking The Cooling System; Adjusting The Clutch Cable Free Play; Adjusting The Throttle Cable Free Play; Lubricating The Throttle - Yamaha YZ250F 2008 Owner's Service Manual

2. Apply the specified pressure.
Radiator cap opening
pressure:
110 kPa (1.1 kg/cm
15.6 psi)
3. Inspect:
• Pressure
Impossible to maintain the speci-
fied pressure for 10 seconds
Replace.
CHECKING THE COOLING
SYSTEM
1. Inspect:
• Coolant level
2. Attach:
• Radiator cap tester "1" and adapt-
er "2"
Radiator cap tester:
YU-24460-01/90890-
01325
Radiator cap tester
adapter:
YU-33984/90890-01352
3. Apply the specified pressure.
Standard pressure:
180 kPa (1.8 kg/cm
25.6 psi)
Do not apply pressure more than
specified pressure.
• Radiator should be filled fully.
4. Inspect:
• Pressure
Impossible to maintain the speci-
fied pressure for 10 seconds
Repair.
• Radiator "1"
• Radiator hose joint "2"
→
Coolant leakage Repair or re-
place.
• Radiator hose "3"
→
Swelling Replace.
ADJUSTING THE CLUTCH CABLE
FREE PLAY
1. Check:
• Clutch lever free play "a"
2
,
Out of specification
Clutch lever free play "a"
:
8–13 mm (0.31–0.51 in)
→
2. Adjust:
• Clutch lever free play
Clutch lever free play adjustment
steps:
a. Loosen the locknuts "1".
b. Turn the adjuster "2" until free
play "a" is within the specified lim-
its.
c. Tighten the locknuts.
Locknut:
4 Nm (0.4 m•kg, 2.9
ft•lb)
Before adjustment, expose the ad-
juster by moving the boot "3" and
2
,
cap "4" away.
• Make minute adjustment on the le-
ver side using the adjuster "5".
• After adjustment, check proper op-
eration of clutch lever.
→
3. Install:
• Cap "1"
• Boot "2"
Place the tip "a" of the cap in the boot.
→
Adjust.
3-7
ENGINE
ADJUSTING THE THROTTLE
CABLE FREE PLAY
1. Check:
• Throttle grip free play "a"
→
Out of specification
Throttle grip free play
"a":
3–5 mm (0.12–0.20 in)
2. Adjust:
• Throttle grip free play
Throttle grip free play adjustment
steps:
a. Slide the adjuster cover.
b. Loosen the locknut "1".
c. Turn the adjuster "2" until the
specified free play is obtained.
d. Tighten the locknut.
Locknut:
4 Nm (0.4 m•kg, 2.9
ft•lb)
Before adjusting the throttle cable
free play, the engine idle speed
should be adjusted.
After adjusting the throttle cable
free play, start the engine and turn
the handlebar to right and left and
make sure that the engine idling
does not run faster.

LUBRICATING THE THROTTLE

1. Remove:
• Cover (throttle cable cap) "1"
• Cover (grip cap) "2"
• Throttle grip cap "3"
Adjust.