bambam_n_chunx Posted September 20, 2018 Report Share Posted September 20, 2018 Pulled the engine apart on a jtr 270 gasgas today to replace the mains and big end. Someone has filled the crank holes with corks and im not sure why?? Also it looks like has a third piston ring groove but no ring. I know its an old bike from 96 but worth saving as its still in good condition. Anyone shed any light? Quote Link to comment Share on other sites More sharing options...
faussy Posted September 20, 2018 Report Share Posted September 20, 2018 The corks are to increase the crankcase compression, pretty standard mod with 2 strokes Quote Link to comment Share on other sites More sharing options...
peterb Posted September 20, 2018 Report Share Posted September 20, 2018 The corks are supposed to be there to fill in the machined holes in the flywheels. The early 270 GG had a 3 ring piston, later ones were supplied with a piston with 2 rings. Bye, Peter B. Quote Link to comment Share on other sites More sharing options...
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