Yamaha XT660R S Service Manual page 22

Tool No.
Valve guide remover (ø 6)
90890-04064
This tool is needed to remove and install
the valve guides.
Valve guide installer (ø 6)
90890-04065
This tool is needed to install the valve
guides.
Valve guide reamer (ø 6)
90890-04066
This tool is needed to rebore the new
valve guides.
Adaptor (Compression gauge)
90890-04082
This tool is needed to measure engine
compression.
Universal clutch holder
90890-04086
This tool is needed to hold the clutch
boss when removing or installing the
boss nut.
Valve lapper
90890-04101
This tool is used for lapping the valve.
Adapter
Spacer (crankshaft installer)
Adapter
90890-04130
Spacer
90890-04144
These tools are used to install the crank-
shaft.
Ignition checker
90890-06754
This tool is used to check the ignition sys-
tem components.
Tool name/Function
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