Bike engine 66cc 80cc large carb adapter.

thingiverse

Built this to adapt a 20-22 mm carb on a 2 stroke bike engine kit. The adapter will plug directly over the existing intake manifold(19mm round). you may use a clamp but it should be fine as its slightly tapered. I will be updating this design later, but for now its functional. the elbow is designed to clear the rear frame of the bike (may not be nessacary for you)