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Head Gasket Thickness
Posted: Sun Oct 28, 2018 9:08 am
by Martin.S
Would any of you have a used head gasket they could measure its thickness for me - I'm trying to work out my compression ratio but I don't at the moment have an old or new gasket.
Thanks
Re: Head Gasket Thickness
Posted: Sun Oct 28, 2018 9:28 am
by clanger9
My solid copper gasket is 1.2mm. I have a (new) composite gasket that's 1.7mm. I think composite gaskets squash slightly when fitted.
The compression ration on these bikes is mostly determined by the piston. There are three types that I know of: the standard piston is available new and gives 7.8:1 (or 8:1 with the 350 head, as used on the earlier CSRs). The later CSRs have a 9.5:1 piston (043647). The scrambler CS has a slightly-bonkers 10.5:1 piston (043748). The latter two aren't available new as far as I know.
Re: Head Gasket Thickness
Posted: Sun Oct 28, 2018 9:39 am
by Martin.S
Once again Paul - Thank you - maybe in future I should just PM you as my personal oricle
