SOHC.co.uk Forums > CB500/550

Crankcases assembled but can't select gears

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ebmbiker:
Long engine mounting bolt is the correct thread. It's an ill wind that doesn't blow a bit of luck!

Sesman:
Use the rear engine bolt and footrest as a make shift slide hammer. It really shouldn’t be tight. Worked for me.

Sesman:
Crossed in the ether…

McCabe-Thiele (Ted):

--- Quote from: ebmbiker on May 26, 2022, 01:55:01 PM ---
--- Quote from: McCabe-Thiele (Ted) on May 26, 2022, 01:46:20 PM ---Sorry I do not think I can help you as it's outside my limited knowledge.

Only question I would ask is was the gear selector drum/selector forks  in the neutral position when you assembled the gearbox internals ?

--- End quote ---

I can't be sure if it was in neutral. The shift drum guide screw [the part that screws in from the top of the crankcase] that I have is the later version without the ball and spring. So there's nothing to fit into the detent on the drum.

--- End quote ---
If I remember correctly I fitted the neutral switch so it was obvious when the switch was in the neutral position but mine is a 400.

philward:
To isolate the problem - ie, whether its the selector mechanism or the internal drum/forks/gears is the problem area, can you not remove the external selector mechanism and try to turn the drum with a a large adjustable pair of plyers (with suitable cloth protection on the drum) - you may need to turn the output shaft to help gear selection (mimiking the gearbox moving). If this works, you will know its the assembly of the external mechanism.
It may save you needlessly splitting the cases.

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