1970 yamaha 125 cc dirtbike?

[chris j]

what kind of engine oil and 2 cycle oil do i use??

[mighal62]

Engine oil depends on the temp where you live. Generally, if you are in a cold climate use 10W30. In a hot climate use 20W40. In a bike that old the maker of the oil shouldn't be an issue. Any 2 stroke oil from a reputable maker will do.