Hi I'm Josh,
just got my first bike this weekend. picked up a 1982 450 for $300, it's in good shape except for wiring which has been spliced and diced so many times that it's a mess. after taking a closer look after i bought it (i should have done it before) i notice the engine is part of the frame and it has some ugly bends at the back end. is it possible to swap the frame from an earlier 450 like 74 or 76? i plan to do a cafe racer but i can't modify the seat with the frame geometry.