here's what i've been working on, a take off on the gebe engine mount. would like to install this engine in the frame with a jackshaft, but they are just too wide and still be able to pedal. i usually use the smaller 25cc engine, better gas mileage and you get to assist which i just love. next bike is on a 1938 schwinn ace. bigger tank, better frame than this monark, although i like the way this frame handles. it feels like a motorcycle. w.