Yamaha YZ 2017 Series Owner's Service Manual page 27

Tool name/Part number
Valve lapper
90890-04101
Valve lapping tool
YM-A8998
Valve spring compressor at-
tachment
90890-04108
Valve spring compressor
adapter 22 mm
YM-04108
Valve guide remover (ø4.5)
90890-04116
Valve guide remover (4.5
mm)
YM-04116
Valve guide installer (ø4.5)
90890-04117
Valve guide installer (4.5
mm)
YM-04117
Valve guide reamer (ø4.5)
90890-04118
Valve guide reamer (4.5 mm)
YM-04118
Rotor puller
90890-04142
Rotor puller
YM-04142
Crankcase separating tool
90890-04152
Crankcase separating tool
YU-A9642
Ignition checker
90890-06754
Oppama pet–4000 spark
checker
YM-34487
How to use
This tool is used to remove
the valve lifter or lap the
valve.
This tool is used to discon-
nect or connect the valve and
the valve spring.
This tool is used to replace
the valve guide.
This tool is used to replace
the valve guide.
This tool is used to replace
the valve guide.
This tool is used to remove
the rotor.
This tool is used to remove
the crankshaft.
This tool is used to check the
spark performance of the ig-
nition coil.
1-15
SPECIAL TOOLS
Illustration