...well 1 does but smokes like a? freight train it has new piston and rings its the head part with valves thats the problem ive got 3 of them and none is anygood i guess i just got one but after looking it turned out to be a 125 head ,my question is could that be honed out to accomodate the top of the piston ?keep in mind its not the cylender ,its the top where the valves are would it work?