No installation instructions included. Watch lots of YouTube instructions. Includes manual for motor. Motor fits in Schwinn Clairmont with 27 inch tires. Maximum speed about 20 MPH on flat ground and throttle wide open with 44 tooth gear. 44 tooth sprocket wobbles side to side. I had to use a large hammer to straighten it. Schwinn has one piece crankset. I bought Euro style sealed bearings and conversion kit. My old pedals were 1/2" and I needed 9/16" so I had to buy new pedals too. I bought an hour meter/tachometer but magneto ignition makes it read twice the RPM. I put Loctite Threadlocker Blue 242 on every screw to prevent screws from rattling loose. One fuel tank bolt was bent away from center which prevented bracket from going on. I carefully bent it back with deep well socket and ratchet. I think I would like to try a 36 tooth sprocket to go faster. Photo shoes chrome cranket. I got black crankset which looks fine on my bicycle. I would buy this kit again.
Arrived fast. shipped from EU. The reductor was not well mounted and it has a little crack but it does not affect anything. The threads are OK. Is the dual chain reductor. For more is OK. I will see how IT will work.