Here's a couple of pics of my happy time build. The details are as follows. Disk hub sprocket adaptor, Through frame throttle cable ( to make it fit). Apart from new gaskets and a cut down pipe mod all is stock. its great fun on a bmx track. Its a tight fit into the frame, i had to dent the top tube to get the spark plug to fit. to change the spark i have to loosen motor mounts and rotate it out to clear the frame. The other interference was the air cleaner so had to make a temporary one till i can get on to doing a better job of it. Then i will do a rear brake ( not that i'd use it, for other peoples sake really). I prefer less cables running around so theres no rush to do that though.