Hi Wall...actually we found a spring loaded brake lever that looks real good on the bike and seems like it will do a nice job as a throttle control.
Really appreciate the offer but that throttle belongs in a display case I think, I found out they are pretty rare !
For the actual engine mount in the bike we had to get a little more creative. We made a "saddle mount" out of some 1" I.D. DOM tubing.
We split the tube and welded a flange along each edge. By loosening the 4 screws you can slide the motor fore and aft to adjust the chain tension...then lock it down.