SOHC.co.uk Forums > CB500/550

Misfire and running on 2 cylinders when hot?

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mike the bike:
It looks like one of the clutch plates is missing.   I'd invesigate that.

Bryanj:
Thats the later clutch with the thick spring loaded steel plate to stop clutch rattle

Hudson.:
^^ Knowledge! Thanks!

Any ideas what might be causing the bike to rev in first with the clutch fully released, then bight all of a sudden? In the rest of first gear it occasionally kicks and jumps about too?

matthewmosse:
Only had this on my 500/4 at 200,000 miles odd covered carting a sidecar around, I belive it was down to worn gear selector forks in the gearbox. Clutch baskett can wear a step in it too causing the plates to stick - I geuss the springs or pushrod being worn or broken might give rise to problems. I also noticed on my hondas that a mal adjusted drive chain or other final drive issues, even tyre pressure can lead to the gearbox playing up, even low engine oil makes em notchy before it gets low on the dipstick. Best advise is start by checking everthing fron the clutch leaver back is spot on - a bad culprit for causing grief is clutch cables that are getting stiff but still appear to work ok either throgh age or bad routing or a combination of both. Either way, a really thourough service can sometimes aleiviate seemingly bad issues that have you thinking an engine overhaul is inevitable.

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