I have a 1200 Watt Cyclone that I first put on an old bike with a free wheel derailer. It shifted fine. When I put it on my new Diamond Bike Recoil, it often does shift & more often shifts 2 gears & gets bound up. Sometimes the chain comes off the front sprocket. When I put my old bike tire & wheel on the Diamond Back it shifter fine. However the new problem was that I didn't have a back brake since the old wheel was designed for the old type brakes & the new one has disc brakes. Does anyone have a solution for this problem of poor shifting with the 8 gear cassette with a motor?