Yamaha WR250F Owner's Service Manual page 63

Handling notes of coolant:
The coolant is harmful so it should be
handled with special care.
• When coolant splashes to your
eye.
Thoroughly wash your eye with
water and see your doctor.
• When coolant splashes to your
clothes.
Quickly wash it away with water
and then with soap.
• When coolant is swallowed.
Quickly make him vomit and take
him to a doctor.
9. Install:
• Radiator cap
Start the engine and warm it up
for a several minutes.
10. Check:
• Coolant level
→
Coolant level low Add coolant.
CHECKING THE RADIATOR CAP
1. Inspect:
• Seal (radiator cap) "1"
• Valve and valve seat "2"
→
Crack/damage Replace.
→
Exist fur deposits "3"
replace.
CHECKING THE RADIATOR CAP
OPENING PRESSURE
1. 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
Apply water on the radiator cap seal.
3. Radiator cap
2. Apply the specified pressure.
Radiator cap opening
pressure:
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:
Radiator cap tester
Clean or
adapter:
3. Apply the specified pressure.
Standard pressure:
• 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
place.
• Radiator hose "3"
Swelling
2
110 kPa (1.1 kg/cm ,
15.6 psi)
→
YU-24460-01/90890-
01325
YU-33984/90890-01352
2
180 kPa (1.8 kg/cm ,
25.6 psi)
→
→
Repair or re-
→
Replace.
3-10
ENGINE
ADJUSTING THE CLUTCH CABLE
FREE PLAY
1. Check:
• Clutch lever free play "a"
→
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. Adjust the free play by changing
their tightening position.
c. Tighten the locknuts.
Locknut:
7 Nm (0.7 m•kg, 5.1
ft•lb)
• Make minute adjustment on the le-
ver side using the adjuster "2".
• After adjustment, check proper op-
eration of clutch lever.
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)
Adjust.
Adjust.