Checking The Coolant Circulatory System For Leaks; Adjusting The Clutch Lever Free Play - Yamaha WR450F Owner's Service Manual

Radiator cap tester
90890-01325
Mityvac cooling system tester kit
YU-24460-A
Radiator cap tester adapter
90890-01352
Pressure tester adapter
YU-33984
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CHECKING THE COOLANT CIRCULATORY
EAS2GC1087
SYSTEM FOR LEAKS
1. Check:
• Coolant level
2. Install:
• Radiator cap tester "1"
• Adapter "2"
Radiator cap tester
90890-01325
Mityvac cooling system tester kit
YU-24460-A
Radiator cap tester adapter
90890-01352
Pressure tester adapter
YU-33984
3. Activate the tester to apply the test pressure.
Test pressure value
196 kPa (1.96 kg/cm
ECA
NOTICE
• Do not apply such a high pressure as ex-
• Make sure that a checkup after the cylin-
• Make sure that coolant is filled up to the
TIP
This model is equipped with an engine auto-
stop system. The engine stops automatically if
left idling for 7 minutes. If the engine stops,
push the start switch or push down the kick-
starter lever to restart the engine.
4. Check:
EWA
When the radiator cap tester is removed,
coolant will spout; therefore, cover it with a
cloth beforehand.
ADJUSTING THE CLUTCH LEVER FREE
EAS2GC1088
PLAY
1. Check:
2
, 27.9 psi)
3-12
ceeds the test pressure.
der head gasket is replaced is made after 3
minutes of warm-up.
upper level beforehand.
• Pressure value
No stay for 5 to 10 seconds at the test pres-
sure value  Correct.
• Radiator
• Radiator hose connections
Coolant leaks  Correct or replace.
• Radiator hoses
Bulges  Replace
WARNING
• Clutch lever free play "a"
Out of specification  Regulate.
Clutch lever free play
7.0–12.0 mm (0.28–0.47 in)
ENGINE