Motoman,
Google your engine model and the Operating Manual pops-up. Pages 7 and 8 should give you some direction. It looks like you will be building the throttle control set-up almost from scratch.
There are folks over at the SmokStak forum with direct knowledge about these power plants.
Nice bike you got there. Looks like there are provisions for a jackshaft, jackshaft band brake, and a scrub brake.