Yamaha YZ450FY 2009 Owner's Service Manual page 24

Tool name/Part number
Timing light
YM-33277-A, 90890-03141
Valve spring compressor
YM-4019, 90890-04019
Clutch holding tool
YM-91042, 90890-04086
Valve guide remover
Intake 4.5 mm (0.18 in)
Exhaust 5.0 mm (0.20 in)
YM-4116, 90890-04116
YM-4097, 90890-04097
Valve guide installer
Intake 4.5 mm (0.18 in)
Exhaust 5.0 mm (0.20 in)
YM-4117, 90890-04117
YM-4098, 90890-04098
Valve guide reamer
Intake 4.5 mm (0.18 in)
Exhaust 5.0 mm (0.20 in)
YM-4118, 90890-04118
YM-4099, 90890-04099
How to use
This tool is necessary for
checking ignition timing.
This tool is needed to remove
and install the valve assem-
blies.
This tool is used to hold the
clutch when removing or in-
stalling the clutch boss secur-
ing nut.
This tool is needed to remove
and install the valve guide.
This tool is needed to install
the valve guide.
This tool is needed to rebore
the new valve guide.
1-10
SPECIAL TOOLS
Illustration