I also have MAC that I don't know the size - I've done some conversion work but maybe it's all a waste of time. Attached are pics of the engine and it has Needle brearings? Does that condem it for junk or can it be saved. I need a layman's explanation of the negatives of having needle bearings. Are they bad even if the crank is supported on two sides with bearings?
Sides7[img][/img][img][/img]