SOHC.co.uk Forums > CB500/550

76´CB550F, born to run, currently rehabing

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florence:
You probably don't need to worry too much about the clunky sounds.  These engines sound lumpy at the best of times, especially from the clutch, at low revs.  Having the carbs out of balance and incorrect ignition timing simply conspire to make things sound even worse. 

Twenty years ago, I worried about mine.  To the low mileage (7k) engine I bought from the states, I fitted new cam chain, tensioners, rebore..  The only reason I put in the camchain etc was because I had stripped the engine to inspect as it had been standing for a while.  It seemed sensible to put in the new parts while I was in there.  In fact it was like new inside.  Well anyway my point is, it sounded lumpier than I would have liked but with regular oil changes, it hasn't grown any worse twenty years later.

I would start with the ignition side first, new plugs, points and set up ignition timing, then move on to carb balance and then jetting for the exhaust/filter combination. 

On my CB500 I have SM air filters and Laser 4-1 exhaust.  I use 110 for the main jet (standard is 100) and it runs very sweetly indeed.  I can't remember the needle position but I think it is in the middle.

Here is my bike as captured in my garden by Steve D, our kind host.

Green1:
Welcome
She sounds just like any other SOHC Iv ever heard.
I was once lectured by an old boy on lack of maintenance and how young scaly wags like me don't look after anything.

I wonder if it was Bitsa on a day trip over here. :P

Mick   

tom400f:
Sounds ok to me.

Not unlike: https://www.youtube.com/watch?v=Ja_kAeU2pd0

Bitsa (Ralph Wright - RIP):
Mick
Naw wernt me mate I dont try and tell the young anything most all ready know it all
Cheers
Bitsa

Bike sounds good to me fine tuning maybe

Green1:
Oh yea forgot to mention apart from the misfire.Agree with oddjob a good tune up works wonders.
If it doesn't sound like it's chewing it's head then it's not a 70's Honda.

Mick

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