Yamaha WR450F Owner's Service Manual page 30

Tool name/Part number
Valve guide remover & in-
staller set (ø5.5)
90890-04016
Valve guide remover (5.5
mm)
YM-01122
Valve guide installer (5.5
mm)
YM-04015
Valve guide reamer (5.5 mm)
90890-01196
Valve spring compressor
90890-04019
Valve spring compressor
YM-04019
Spacer (crankshaft installer)
90890-04081
Pot spacer
YM-91044
Universal clutch holder
90890-04086
Universal clutch holder
YM-91042
Valve lapper
90890-04101
Valve lapping tool
YM-A8998
How to use
This tool is used to replace
the valve guide.
This tool is used to discon-
nect or connect the valve and
the valve spring.
This tool is used to install the
crankshaft.
This tool is used to hold the
clutch when removing or in-
stalling the clutch boss secur-
ing nut.
This tool is used to remove
the valve lifter or lap the
valve.
1-16
SPECIAL TOOLS
Illustration
YM-04019
YM-91044