Checking The Coolant Circulatory System For Leaks; Adjusting The Clutch Lever Position; Adjusting The Clutch Lever Free Play - Yamaha YZ450F Owner's Service Manual

CHECKING THE COOLANT CIRCULATORY
EAS1SL5076
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-
ceeds the test pressure.
• Make sure that a checkup after the cylin-
der head gasket is replaced is made after 2
to 3 minutes of warm-up.
• Make sure that coolant is filled up to the
upper level beforehand.
4. Check:
• 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
EWA@
WARNING
When the radiator cap tester is removed,
coolant will spout; therefore, cover it with a
cloth beforehand.
ADJUSTING THE CLUTCH LEVER POSI-
EAS1SL5077
TION
1. Adjust:
2. Tighten:
ADJUSTING THE CLUTCH LEVER FREE
EAS1SL5078
PLAY
1. Check:
2
, 27.9 psi)
2. Adjust:
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the adjuster "1" in direction "a" or "b"
3-10
• Clutch lever position "a"
Loosen the locknut "1" and use the adjuster
"2" to adjust the clutch lever position "a" as
desired.
a
• Locknut
Locknut
4.8 Nm (0.48 m·kgf, 3.5 ft·lbf)
• Clutch lever free play "a"
Out of specification  Regulate.
Clutch lever free play
7.0–12.0 mm (0.28–0.47 in)
• Clutch lever free play
Handlebar side
until the specified clutch lever free play is ob-
tained.
Direction "a"
Clutch lever free play is increased.
Direction "b"
Clutch lever free play is decreased.
ENGINE
1
2