I finished a new adjustable rack system designed to fit different gas engines and an electric motor. Here's the pics. The engine on the bike is a 2.4hp 81cc, bike cruises at 30mph with 190lb rider.
Yes that roller assembly is amazing. What roller? Is it a small rim? Is it bolted on to the sprocket? Where does the sprocket come from? How many teeth on the clutch and on the roller?
The roller is a small rim. I at first made one with the standard steel roller, high speed bearings etc. But this set up worked better and it's super quiet, as is the engine, being it a 4-stroke. The sprocket is welded to the rim. I think it's 12t/20t (about) I had 12t on both at first, but the bike was waaaayyy too fast.
looks a little heavy in the rear.the rim roller would try and spin more tire on the bigger part of the rim than the smaller part of the rim.will that cause wear?