SOHC.co.uk Forums > CB350/400

Piston ring querie

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taysidedragon:
I'm  a bit puzzled why you dismantled the top end at 14k miles. Was there a problem with the engine?

robvangulik:
Piston ring ovality will never be a real problem on these bikes, as the rings tend to rotate more/faster at higher revs AND loads, search google for "rotating piston rings" , most research is done with, in our eyes, very low revs.

watty51:
 Thanks for the replies

I had to dismantle the top end due to cylinder head removal to sort out the spark plug threads.

I decided to replace the base gasket just in case the cylinder head removal had disturbed it. While I was sorting that out I thought just check all tolerances/specs, before putting it all back together.

Not sure which way to turn with the piston rings but I think the mileage is accurate, so will have a think about that one.


 

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