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Tool name/Part number
Valve spring compressor
YM-4019, 90890-04019
Clutch holding tool
YM-91042, 90890-04086
Valve guide remover
Intake 4.0 mm (0.16 in)
Exhaust 4.5 mm (0.18 in)
YM-4111, 90890-04111
YM-4116, 90890-04116
Valve guide installer
Intake 4.0 mm (0.16 in)
Exhaust 4.5 mm (0.18 in)
YM-4112, 90890-04112
YM-4117, 90890-04117
Valve guide reamer
Intake 4.0 mm (0.16 in)
Exhaust 4.5 mm (0.18 in)
YM-4113, 90890-04113
YM-4118, 90890-04118
Rotor puller
YM-04141, 90890-04141
Dynamic spark tester
YM-34487
Ignition checker
90890-06754
How to use
This tool is needed to remove and
install the valve assemblies.
This tool is used to hold the clutch
when removing or installing the
clutch boss securing 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.
This tool is used to remove the fly-
wheel magneto.
This instrument is necessary for
checking the ignition system compo-
nents.
1-6
SPECIAL TOOLS
Illustration

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This manual also for:

Wr250fx

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