I read about the head gasket being only 0.25-0.3mm. Someone on here- I think Matt@TYGA- posted that.
Stock squish is 1.2mm +/-0.1mm (Again Matt@TYGA). -0.25mm would give 0.95mm. Getting close to right for racing... Minus another 0.2mm(Sp heads/R cyls) gives 0.75 in theory. I'll be on avgas, with adjustable ignition, so that sounds bang on...
Again, I'll be measuring things on the bike before I fiddle-CC volume etc...
Cheers
Kieran
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The Chopster