That I'm still wondering why they manufacture engines with a 32mm motor mount to put on bicycles with a 42mm tube to mount it on. Current projects are Micargi Pantera GTS/GT5-GGG-2 66cc and a Schwinn Landmark/Skyhawk GT2B 48cc. Right now both are still pretty much still in the box while I continue to gather information. If I ever get them finished then it's on to putting a recently acquired 2008 1300cc Hayabusa engine in a Huffy Cranbrook.