Brushless DC Motor 3000W 72V Electric Motor High Power Brushless Controller 50A Scooter Motor Go Kart Electric Motor Kit (No Brackets and Bases Installed)
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Availability:
Only 9 left in stock, order soon!
Arrives
Tuesday, May 5
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Features
- Brushless DC Motor 3000 watt powerful motor, The motor adopts all-copper lugs, high-quality magnets and rotors, low-noise operation and long service time;This motor does not come with an installation bracket or base.
- 3000W 72V Electric Motor, 4hp high power and high speed, 4900rpm/min rate speed, 6700rpm/min max speed, 45 amp rate current , 5.4N.m. of torque and 100-150kg ( 220 - 330lb ) maximum load;
- Brushless Motor Controller 50A, 48-72 volt, 3000 watt, 120phase degree; Multifunctional intelligent controller Low-level brake, 3 Speed, Reverse, Brake Light, Indicator Light, Battery Charge and Ignition Lock;
- Three-speed Throttle: three speeds can be adjusted, low speed 50%, medium speed 75%, high speed 100% and also has a reverse switch, Cable length is about 150cm ( 59 inches );
- Package Include: 72V 3000W Motor*1pc, BLDC Controller 50A*1pc, 3 speed throttle*1pc, Ignition Lock*1pc, T8F Sproket*1pc, T8F Chain*1pc, Manual*1pc (without battery).
Brand: Kunray
Speed: 4900 RPM
Voltage: 72 Volts
Horsepower: 4 Horsepower
Product Dimensions: 6.33"W x 4.13"H
Brand: Kunray
Speed: 4900 RPM
Voltage: 72 Volts
Horsepower: 4 Horsepower
Product Dimensions: 6.33"W x 4.13"H
Material: Aluminum
Item Weight: 8 Kilograms
Manufacturer: Kunray
Item Weight: 17.6 pounds
Item model number: kr3kw-nofoot
Date First Available: May 19, 2022
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, May 5
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
This 72V motor is absolutely top-tier and exactly what anyone doing dirt bike upgrades needs. The power increase is incredible — strong torque, smooth acceleration, and noticeably better performance on trails and hills. It runs quietly, stays cool, and feels solidly built with high-quality materials. Installation was straightforward, and the motor responded perfectly right out of the box. Compared to other upgrade motors I’ve tried, this one is by far the best in overall quality, reliability, and performance. If you’re looking to upgrade your dirt bike with something durable, powerful, and worth every penny, this 72V motor is the perfect choice. Highly recommended for riders who want serious improvement!
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Reviewed in the United States on November 24, 2025 by Natalia Sulka Natalia Sulka
This Ebike motor kit is very easy to install and Preforms well. I’d get the heat sink for the motor since it could get hot when using on steep hills. The wiring diagram was very intuitive and easy to follow. It’s geared a bit high so it’s great for speed 50mph + but you should get a lower gear ratio for off road. I had to counter sink 2 of the Motor bolts to make flush for mounting on the Razor MX650. Everything else was very easy to retrofit and worked well. I would recommend this kit for anyone who wants to upgrade their Ebike or MX motorcycle
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Reviewed in the United States on October 14, 2024 by Stevie Wonder Stevie Wonder
I bought this motor for my son's MX650. It almost fit without modification. I had to drill the holes for the screws a bit so the screws would counter sink. It was very easy. This motor is a beast on my son's MX650. I put 1 size larger front sprocket on it. OIt'll do about 60mph. Great little motor, and bundle for the price. One more thing, this seller has other motors. I first looked at one with more feedback on it, but it was for a go-cart type of set up with a mount on it. I asked the seller about a motor for a Razor. They directedd me to this motor so i don;t have to cut the mount off. Very responsive and fast seller.
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Reviewed in the United States on February 15, 2023 by petedacook
The media could not be loaded. Bought two of these to mod our Razor 500's. We're running the 72v, 25ah 50A batteries with it and they ROCK! We had 48 mph with this setup. So fast that I took the High speed off my son's bike; it's just too fast for a teenager. Straight forward Plug And Play. Nothing weird or strange. Throttles "could" be made better/stronger than they are (broke one already-three weeks in) but replacements are super cheap and easily available on Amazon. This kit is NOT for little kids, with the gearing it wants to wheelie right off the bat. Sit forward and hang on. Would like to know from the Seller what type of chain they send with the kit; I need a 1/2 link to properly tension my chain since it stretched a little. Taking out a whole link is too much so I need a 1/2 link, but don't know which one to buy for it.
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Reviewed in the United States on October 15, 2023 by Jennifer Douglass
this product was a really great purchase it worked as needed at is very good quality. 10/10 would recommend buying
Reviewed in the United States on October 23, 2025 by Silvestre Ruiz
So far it's been installed for 3 days and now the throttle is sticking full throttle. Not sure how to feel yet
Reviewed in the United States on April 2, 2025 by Jamie
No customer service options through Amazon for troubleshooting this product. Bought last year and put around realistically 50 miles on it before it started knocking and making a loud noise. These things aren't cheap and pretty sure I'm stuck with a motor that's going to break soon as it gradually gets louder by the week. Definitely don't recommend for anyone. Purchase a FW11 or QS motor. They're more expensive but you'll be 100 times happier in the end. If these things break you are on your own.
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Reviewed in the United States on April 3, 2025 by Hifisoundisajoke
Great for MX650 upgrade. More than doubled top speed and fun factor with 72V 20ah battery. 40mph+
Reviewed in the United States on July 12, 2025 by Zac Cooper Zac Cooper