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Doms CB550F1 project
DomP:
--- Quote from: Oddjob on August 31, 2023, 01:20:56 PM ---Depends what you mean by throttle stops
--- End quote ---
I've just got a Haynes manual today which says 56mm. This is what I was referring to Ken
DomP:
I think this engines not well, far too much blue smoke and I can't get the it to idle well enough to balance the carbs even. I just can't work out what to do next.
Oddjob:
Strip the head and barrels off.
DomP:
--- Quote from: Oddjob on September 02, 2023, 03:44:06 PM ---Strip the head and barrels off.
--- End quote ---
Yes I think so Ken, to be honest it's got an oil lea from the head gasket that needs sorting so I'm going to be going in there at some point so might as well now. Also a few times after turning it off the exhaust has made a king of vacuum stuck back noise, what's that?
Oddjob:
Sounds like either a bent valve or a really bad valve seat problem, so it's pulling air down the exhaust due to the poor seal.
Don't forget to replace the valve stem seals whilst you have the head off.
I suspect you'll find rings stuck in the grooves on the piston as well
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