I put the kit on my bike and was pleased with the power. I weigh 180 lbs However, there was an issue with the twist throttle, which is tightened with a hex key but seems to continually come loose and will. Also, after about 200 km, the motor makes an electric noise even when the throttle is not being used to send power through it. It also has a habit of lurching which can be a bit alarming. Overall, very good so far and fast shipping.
Very good product, everything works great. It delivered in about 7 days...Head light wires were too short. Mounting plate holes behind the sprocket gear had to be drilled out more to make 2 bolts fit. Because every bicycle is different, i had to mount the motor behind the bike,,,, and I only used 2 of the 3 mounts on the motor and it still works... On a small wheel bicycle, using 2 lead acid batteries, it reached 16.23 miles per hour top speed. Very good product !