I built it from scratch. Not one part is original. The engine top is a 1965, the bottom is a 64, the head and cylinders are '64 a few transmission gears are '62. I took 3 bad engines, a 1962, 1964 and a 1965 and built one. I actually assembled the engine with old pistons with new rings and it ran. Later on (last year) I bored the cylinder, added new pistons, rings, wrist pins and a valve job because the engine burned oil. Now it's my daily rider and runs like a top.
Not to debunk Sam's advice of BTL's expertise, after all they out rank me in every way, but to point out that these little Honda's have a lot of interchangeable parts and Honda was/is the industry leader of production standardization. So swap away (IMO)








