SOHC.co.uk Forums > CB500/550

Gearbox

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cb550k-aaron:
Hi guys, i'm having bother trying to engage 3rd gear, its only this gear, any suggestions? It was selecting it last year but it would slip out of gear

hairygit:
Sadly I have seen this a few times over the years, normal cause is a worm or vent selector fork. The 500/4 was well known for it, and the selectors were modified for the 550's but do still fail occasionally. Someone else may have a different view on it, but my money is on the selector fork.

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Bryanj:
If its been slipping out you will need to change the gears as well as the dogs will have rounded edges. One pair of gears was modified but and must be changed as pairs as the tooth profile altered but cant remember which ones

Bryanj:
The 550's all use the later setup mate

Tomb:
Why you're struggling to engage 3rd? when the motor is running?

To stop slipping out of gear it is possible to undercut the gears, an angle of about 3o and ground back a little to sharpen the corners again does it. Careful not to undercut too much of an angle otherwise quick shifting and clutchless shifting is compromised.

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