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Originally Posted by kaneo  Hello there, Im not a motor bike mechanic but i did build pro stock drag motors for a few years. Looks like you may be getting some oil blow by on that rh side of the piston. Maybe the rings have lost their tension. The oil getting into the cylinder would make it knock or ping at idle. Compression tests are useless if there is any oil present as it can seal faulty rings giving you good readings. Pressure leakage tests are the way to go. But thats a pros job to do. My thoughts but i could be wrong.  |
..Iam with you on that...looks like a classical Blowby!!
