Im in the process of rebuilding my HK0 motor. The head had a stripped spark plug, and now its also got a stump of a screw and an easy out broken off in one of the fin cover holes. The cylinder itself looks to be ok, but will probably need to be one size over. It has some staining inside it, but nothing that fails the fingernail test. Ive been watching from a distance all the possible engine combinations but am not sure where to take this. The four speed crank doesnt have any slop in it and is useable. Im switching from the mitsu stator over to a hitachi. I'd like to keep the crank, and the original look of the carb and air filter combo. Will an 12v big bearing honda head from a 91+ ct 70 fit? Kinda would like to hear my options. Not trying to set the world on fire with speed, but i'd like to avoid chinese junk.