SOHC.co.uk Forums > CB500/550

engine sounding like a 'diesel' at low revs.......wtf?

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florence:
It is worth bearing in mind that all of these 500/550s sound rough at low revs even when they are set up correctly and all parts in good order.  I had a genuine 7000 mile engine with replacement cam chain, tensioners etc and it sounded like all the others I have heard, i.e. like a bag of nails, but increase the revs slightly and all extremely smooth.  17 years later and it sounds exactly the same, no worse.

I don't think they are really designed to run at low revs.  When I adjust the tickover there seems to be a sweet spot which I run up to.  My rev counter is broken but I think it is about 1200 revs.  Just remember, if you have the tickover too slow you won't have as much oil going up to the top ;-)

(maybe you can get them to run slower with stock airbox, exhaust and electronic ignition)

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