i picked up a 70's sears sr minibike and have a built clone engine going on it
:bsp 6.5hp,billet rod and flywheel, nr274 cam,26lb springs,reinforced 1.1 rockers,chromo pushrods,8* timing key, mikuni 22 vm kit, case and head studs,mini bike header and a max torque clutch12t and a set of 6"...