Pappy here, what I thought my old user name was doesn't work so I made a new one. My A10 got major rebuild some years ago, but then even after many break in miles it always had a lot of oil in the right side cylinder, fouling the plug eventually. Checked cylinder bore for scoring, tightened up valve stem clearances, replaced head gasket, top end oil supply looks ok. No change. Then I left the gas tap on last winter and the thing seized, so I took it to the same mechanic as did the rebuild long ago and he honed cylinder and replaced the rings. Now the thing has excess oil in the LEFT side cylinder! Leaks oil out the exhaust to cylinder had joint, and also oiling the plug. Right side is ok. Took the head off, no sign of a leak path under the head gasket from oil passages to combustion chamber. Valve stem clearance is in spec. Valve guides are not lose. Rocker box moving parts look fine. Ideas? Defective rings? But has anyone ever actually experienced defective new piston rings? Twice? In all the cylinders in car engines and bike engines I have done myself I never have. Should I just send the thing to SRM?