Is there anyone who can answer how big pistons in a Intruder/Invader-engine should be at the top?
Because I have problems with my engine sounds like a rock crusher despite new pistons and cylinders are fine.
When I study my new pistons as they have become smooth and shiny between the piston rings on the exhaust side. I suspect that this is where the sound occurs
Crankshaft is restored and as good as new
Coating of the cylinders are also like new