Sym PA12B Service Manual page 80

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4 、 Lubrication / Clutch / Transmission
Disassemble the shifting cam. (Bolt×1)
Remove the 4×10mm alignment pin.
Shift cam
Inspection
Check the shifting spindle and the fork
assembly to see if any damage.
Check the shifting drum stopper arm and the
return spring to see if any damage or worn.
Check the gear shifting cam to see if any worn
or damage can be found.
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