It's really not that hard to build one. I know you could make a spindle drive with a clutch. There was one bike at the last race that had that set-up. Check out DDM. I'm sure they have the set up. I'll look around and see what I can dig up.
I figured out from the picture and the picture of one that was complete that the fuel tank is missing. It would have been nice if I had known that BEFORE i bid on it. I think I have one around here but It i probably shaped wrong. Sitll Im most likely going to remove the case anyway. I can probably make it work.
It doesn't look as thought he centrifical clutch is still attached to the motor. If it is I probably will try to fix the pull starter. If it isn't there I might not even bother to fix the pull starter.
ummm i have a question i am new to this site and this idea of weedeater powered bikes, but if you dont have a clutch on your weedeater...mine is a 21cc featherlite...will you be able to push start it or would you need the pull start left on with the shroud? any ideas please let me know