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SPECIAL TOOLS
GEN
INFO
Tool No. Tool name/Usage Illustration
90890-03141 Timing light
This tool is needed for detecting
ignition timing.
90890-04101 Valve lapper
This tool is used for removing and
installing the lifter and for lapping the
valve.
90890-04019
-04108
Valve spring compressor
Attachment
These tools are used when removing
or installing the valve and the valve
spring.
90890-04058
-04078
Middle shaft bearing driver
Mechanical seal installer
These tools are used for installing
mechanical seal.
90890-06754 Ignition checker
This instrument is necessary for checking
the ignition system components.
90890-85505 Yamaha bond No. 1215
This sealant (bond) is used for crankcase
mating surface, etc.