Lately I've been thinking of a way to use some of the full suspension bikes I have laying around. I'm leaning towards rear mounting the engine on a rack above the wheel and using the regular chain drive/ragjoint setup since I already have several rims assembled with sprockets. This would allow the suspension to function without chain problems and looks like it will work quite well. I'll simply cut the intake manifold to use the straight section which will level the carb nicely. I will mount the tank above and behind the motor on a stand. The pipe will be easy to route along the framestay. This is a mock up on the narrow crank german made Sears frame I am currently messing about with. This would instantly solve all crank clearance issues too! Roughing out the engine cradle with some welded steel angle and a section of frame tube. Also have a rear rack-like section of pocketbike frame that will make a good solid platform for this. I'm hoping to have a chain adjustment feature built right into the motor mount. The rack section with the motor and mount will attach to the rear framestays. One worry is the length of the cables... another is butt clearance from the spark plug and head... But it looks doable and I have seen very few rear mounts. Opinions?