since it is a two stroke the oil is burnt to lube the piston, and the gear box takes regular motor oil but when i take the muffler off and hand crank it i can see motor oil on the piston, so does the motor oil lube the bottom of the piston and the 2 stroke oil lube the top, or are my rings shot ? the bike starts and runs good, and seems to have good compression, but smokes out my garage when i start it, i am not using the oil injection system i premixed the gas so it can't be to much 2 stroke oil, i have not had it on the road because i just bought it.