Re: Is there an aftermarket manual cluch kit?
A while back, one of the DIY builders here modified a centrifugal clutch by adding spring loaded pawls that allowed him to pedal start his motor. I think he needed a compression release too to get the motor spinning. After it started, cent force kept the pawls dis-engaged. If you're handy at tinkering and modifying stuff, it wouldn't be too hard to do.