The 48 volt 2000 watt motor, controller, and handlebar throttle came fast by FedEx. I installed the unit on a 3 wheel trike. The bike had a place I thought might accommodate the motor. The project took several days . I had to make a plate and secure it with some bolts to the frame. Drilled holes in plate . The Double D sprocket that comes from china will need replaced with a #25 or #35 by 10 tooth double D sprocket so you can match it to another Sprocket on the axel of the bike. That way you use a #25 or #35 chain to run your trike. It takes some engineering, time and you would save almost $2000. As electric trikes are expensive. I purchased a 48 volt 14Ah lithium battery from eBay delivered for less than $200.00 . I was a grain farmer in the south, so working with things like this was not to difficult. Many trips to hardware store for bolts and nuts. I purchased a 3 speed switch from Amazon . I do not have a speedometer but I am sure it goes over 25 mph . Powerful motor. You have to ease into the throttle as the torque is powerful. I purchased a controller cover/box from Amazon to protect the controller. Takes a large one. The box can be secured to the bike with clamps, like what you would use on a hose, but much larger. It took a lot of time but at 77 years old , I have enjoyed the project. In my case a 70 tooth sprocket was needed, but there was no room so I placed a Jack shaft between the motor and the axle. This requires 2 chains and sprockets. It can be done. Good luck. God Bless.

I converted a gas scooter to electric and it runs like a dream with the 1800 watt Vevor motor. No more mixing gas and oil mixture and no more struggling to crank every spring season.

Had installed 3 of them already on mx650 razor not much modification is needed only to remove motors 2 washers and put the bolts back on everything else is plug and play.

I made a custom mount to put this on a mountain bike. To be honest it's all rigged up and looks trashy, but I'm to blame for that. This is a really beefy motor that'll spin up real fast. However it's doesn't have a lot of torque. If your going to put this on something that propels a human(I assume you would), then your going to need a really low gear ratio to get moving. You'll loose a bit of top speed but this motor is so fast I wouldn't worry about it. I like that it has many optional wires on it for things such as lights, reverse, different speed levels, and more.

I did test the unit and it does spin, no wiring diagram but there are images and tips on YT if you search brushless speed controller. You need to use a jumper or on/off switch on the connector marked "lock" I would also recommend using a 30 amp switch on the + side of the battery connector.

Worked well to upgrade the motor on a razor electric dirt bike. Arrived on time and everything worked well. Happy customer!-SM

It works good but haven't try on bike yet, easy plug and ply connections, all works as describe...

The motor looks good, but I did not test it yet. I am very disappointed that I never received the chain shown in the picture.Edit: I spoke with customer service twice, and was finally helped out the second time. My 3* went to 4* because she was just great. I tested the motor and it runs very well. If you don't care for the chain, get this motor.