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ported cylinders

  1. Vintagemotorized

    Help!! My is my jug shot?

    my bike has had compression issues after I ported and polish the engine at first I blamed the base gasket that I made out of cheap gasket maker (it was pretty much bare metal) but when I removed my jug I found these scratches on the cylinder wall going from the top to one of the ports I believe...
  2. inspectorcritic

    Is there any reason why I cant use a cardboard gasket in plce of metal

    Will another head and another piss oil case is a there reason why I half to use a metal gasket oppose to a fabric gasket? Only one I can think of is more space less compression the material board I have is for high heat it can take it my laser temp gun says 180 degree heat. Also what I have...