I started with my 1978 XS500 4-stroke twin,a destroyed '92 Yamaha Blaster 200 quad,and a 1989 YZ250 roller chassis.Long story short, the 8 valve lump has been replaced by the 2 stroke, single cylinder, 6 speed,YZ suspension/wheels/brakes swapped out,different body work- fenders[Acerbis].I...