Yamaha YZ125(D) Owner's Service Manual page 50

3. Radiator cap
2. Apply the specified pressure.
Radiator cap opening
pressure:
95–125 kPa (0.95–1.25
2
kg/cm , 13.5–17.8 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 LEVER
FREE PLAY
1. Check:
• Clutch lever free play "a"
Out of specification → Adjust.
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
cap "4" away.
2
,
• 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.
3-7
ENGINE
ADJUSTING THE THROTTLE GRIP
FREE PLAY
1. Check:
• Throttle grip free play "a"
Out of specification → Adjust.
Throttle grip free play
"a":
3–5 mm (0.12–0.20 in)
2. Adjust:
• 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:
7 Nm (0.7 m•kg, 5.1
ft•lb)
Prior to adjusting throttle grip free
play, the engine idling speed should
be adjusted.
After adjusting the throttle grip
free play, turn the handlebar to the
right and to the left to ensure that
this does not cause the engine
idling speed to change.