Yamaha 2004 WR250FS Owner's Service Manual page 24

Part number
YM-01442, 90890-01442 Fork seal driver
This tool is used when install the fork oil seal.
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.
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 - 8
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INFO
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