AmpFlow P40-250 Brushed Electric Motor, 250W, 12V, 24V or 36 VDC, 3400 RPM, Black

I purchased this motor as an upgrade on my Razor e300 scooter. The positive is that the motor seems to give the scooter more power than the original 250 motor did. The top speed did not seem to change a whole lot however. When I completed my test run the motor wasn’t overheating and seems to work well. The negative is that I had to drill holes in order to get it to fit properly. It may fit for other models of the scooter but for me it was a bit off. If you are looking for a motor the is a direct replacement you may want to look at a different motor but this does seem like a good motor and is a good upgrade if you have the ability to make it work.

Wasn't strong enough to do the job I wanted but worked very well. I plan on keeping it for another project. Good motor.

This is the third motor I have used w 350 w On grandsons dirt bikes. Over volt kits from fast Scooters This motor is by far the fastest huge difference in power. Just Ordered another one. 48 volt over volt kit This is the motor. 100 Percent one Grandson is happy my other grandson is crying until his Motor gets here. He can’t even stay w his younger brothers new motor.

12 v runs slow 24 does to but 36 v runs good. Needs to change dc electric motor to Need ac ones for day time while this one for night ac daytime dc night time especially when making generator. We need ac and dc covering all electric boost converter

I bought this motor with the intention of removing the pulley, as the seller stated was possible in one of the answered questions. Since the motor has a D shaft and a circlip, I assumed the pulley wouldn't be pressed on (or if it was, it wouldn't truly be an interference fit). I was wrong. On top of that, the pulley seems to be made of cheese grade sintered metal, which broke when I hit it with a hard rubber mallet (part of the flange broke off). I attempted to heat the pulley with a torch to remove it, but I'm afraid because the shaft is so small/short, I'll get the rest of the motor too hot and damage it. The motor is much noisier than I expected too, though I didn't run it until after I attempted to remove the pulley, so I can't be sure if that's because I damaged the bearings. All in all, $59 + tax wasted.

I got this motor for a project I'm building. The motor has proven to be strong with no issues. It will run on a wide voltage range (9v to 36v). This made it a great motor for my purposes and I plan on buying more of these for other projects in the future. Shipping was ok, a little slow for my taste, but still arrived with no defect.

I purchased this AmpFlow P40-350 to install in my son's razor MX 350 and I'm more than impressed. I overvolted the bike to 36 volts and this motor handled it without any heating issues while driving the bike to 27mph. Being the geek that I am, I upgraded the bike to 48 volts. At 48 volts this 350 WATT motor drives the bike up to 32.6 mph. It gets a little warm if I ride it hard on the dirt bike trails but not too hot to touch. I'm also 190 lbs. My son can ride it like he normally rides (fast and hard) without any thermal issues. I'm so impressed that I bought this motor's bigger and badder brother: the AmpFlow G43-500 to see if we can get the bike to over 40 mph.

Using as a generator with 3d printed wind turbines. Good consistent output, been running outdoors in the cold for about a month without issue (covered of course).

Great motor, very responsive from top to bottom of the voltage range. TONS of Power!!

I didn't dislike any part of it.

Powerful little motor. As described.

Prompt delivery, item was as advertised

I'm happy with the motor just not happy about the customer support and the sprocket option for my setup I can't run the 1/4" roller chain I need the 1/2" bicycle sprocket for the motor