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Part number
YS-1880-A, 90890-01701
Sheave holder
This tool is used for when loosening or tightening the
flywheel magneto securing nut.
YU-3112-C, 90890-03112
Pocket tester
Use this tool to inspect the coil resistance, output
voltage and amperage.
YM-33277-A, 90890-03141
Timing light
This tool is necessary for checking ignition timing.
YM-4019, 90890-04019
Valve spring compressor
This tool is needed to remove and install the valve
assemblies.
YM-91042, 90890-04086
Clutch holding tool
This tool is used to hold the clutch when removing or
installing the clutch boss securing nut.
YM-4111, 90890-04111
Valve guide remover
YM-4116, 90890-04116
This tool is needed to remove and install the valve
guide.
YM-4112, 90890-04112
Valve guide installer
YM-4117, 90890-04117
This tool is needed to install the valve guide.
YM-4113, 90890-04113
Valve guide reamer
YM-4118, 90890-04118
This tool is needed to rebore the new valve guide.
YM-04141, 90890-04141
Rotor puller
This tool is used to remove the flywheel magneto.
Tool name/How to use
Intake 4.0 mm (0.16 in)
Exhaust 4.5 mm (0.18 in)
Intake 4.0 mm (0.16 in)
Exhaust 4.5 mm (0.18 in)
Intake 4.0 mm (0.16 in)
Exhaust 4.5 mm (0.18 in)
SPECIAL TOOLS
1 - 12
GEN
INFO
Illustration
90890-03112
90890-04111
90890-04116
90890-04141
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