No, mainly because you need a hub for the cluster gear to thread onto. It's a waste of time really, drive chains are a different size then bicycle ones, unless you intend to install this on the pedal side any setup from a bicycle is going to be short lived. You would be better off hopping up the engine in some way, porting, carb, exhaust, then messing around with bicycle parts.
Call it a shovel with a rope handle, deraileur systems such even on bicycles, they get full of debris, they go out of adjustment, the deraileurs get caught on things. The only practical way to have gear on the rear end would be to have something like a Sturmey Archer internally geared hub, but finding one beefy enough to take the horsepower would be difficult.