Kunray Electric Brushless DC Motor 72V 5000W Electric Dirt Bike Motor Peak 6800rpm Peak 10KW for Go Kart Razor Upgrade Kit Motorcycle and More (Upgraded Brushless DC Motor, 72V 5000W)
Condition: New
Buy Now, Pay Later
As low as
$46.00
/ mo
Learn more
- – 6-month term
- – No impact on credit
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
FREE refund/replacement until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
Only 3 left in stock, order soon!
Arrives
Saturday, Jan 10
Recently Viewed
Size: 72V 5000W
Style: Upgraded Brushless DC Motor
Features
- Electric Brushless DC Motor ParametersElectric DC Motor Rated Vol 72V,Rated Watt 5000W, Peak 10KW, Rated Speed 6900rpm, Peak 8000rpm, Rated Torque 8.5N.m, Peak 35N.m,Rated Current 60A, Peak 80-100A. Mid Drive Motor Pure Copper Core, Max Efficiency 90%, Energy Saving, With High Temperature Resistance, BLDC Motor Fit With T8F/25H Sprocket, Manufacture by Kun-ray KR5V.
- Electric DC Motor New Upgrade V-Magnet RotorKR5V Electric DC Motor Upgrade V-Magnet Rotor 5 Pair Magnet Poles, 72V Motor With KTY84-130 Temp Sensor, You Can Adjust the Temperature Through the Programming BLDC Motor Controller to Better Protect the Motor and Extend the Service Life of the Motor.
- Electric Dirt Bike Motor With HeatsinkElectric Go kart Motor With New Design Add the HeatSink, Air Cooling, Class F(155C),Electric Motorcycle Motor IP54 Waterproof, 100% Full Copper and Aluminum Body , The Brushless Motor Kit With Fardriver BLDC Controller Current 100A, Phase Current 300A, 18mos High Quality Motor Controller. (suggest use the 80-100A max for the motor) NOTE: DONT TOUCH THE MOTOR WITH YOUR BODY WHEN IT WORKING HEAT UP.
- 72V Motor New Design Hall Sensor ExtenalPowerful Mid Drive Motor Hall Sensor Extenal, The Hall sensor install in the Back Cover It is Not Easy to Burn out Compared to Placing it Inside The Motor, Note: Please do not Take Out The Screw On the Hall Sensor , Otherwise The Electric Motor Will Not Running Well.
- 5KW Electric DC Motor Wide ApplicationElectric Motor Kit for Go Kart ,Electric Dirt Bike Motor, Brushless Mid Drive Motor For Razor Upgrade Kit MX500 MX650 SX500 RSF650 , Brushless Motor Kit for Electic Go-Karts Kit, Electric Dirt Bike Motor Kit, Electric Motorcycles, Electric Scooter Motor, ATV, etc.NOTE:This product is not suitable for under 14 age.
Brand: Kunray
Voltage: 72 Volts
Horsepower: 5000 Kilowatts
Product Dimensions: 4.56"W x 5.35"H
Item Weight: 12.7 Pounds
Product Dimensions : 4.56 x 4.56 x 5.35 inches; 12.7 Pounds
Item model number : KR5V
Date First Available : October 11, 2019
Manufacturer : Kunray
Best Sellers Rank: #498,548 in Automotive (See Top 100 in Automotive) #2,862 in Automotive Motors
#2,862 in Automotive Motors:
Customer Reviews: 4.1 4.1 out of 5 stars (419)
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Jan 10
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.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
![BEN'SHOME® Lifetime Couch Cushion Support [19.7”x 58-67"] - Strong Solid Wood Seat Insert for Fix Sagging Cushions Living Room Sofa Seat| 0.5" Thick & Durable](https://m.media-amazon.com/images/I/81WW-6HHNzL._AC_US500_.jpg)
![Replacement Battery KX50 [Upgraded] for Motorola Moto G Stylus XT2043-4/G Stylus XT2043 XT2043-5 XT2043-6/G Pro XT2043-7 Battery Free Adhesive Tool](https://m.media-amazon.com/images/I/713u2m5e2QL._AC_US500_.jpg)
Top Amazon Reviews
Size: 48V 1600W
Style: 48V 1600W
Nice little kit. Used this kit to convert a go kart to electric, run it off of 60 volt DeWalt batteries. Works great, all options work as they should. Reverse, brake lights, 3 speed switch, variable throttle, everything was good to go. Easy to wire, some labels are a little odd in translation from Chinese but pretty easy to figure out. Variable speed peddle is nice, controller can get a bit hot after an hour of continuous use andmay need a rest to cool off. Using the 3 speed setting switch 1st did 12.1 mph topspeed with a 60 tooth axle gear, I didn't use the gears or chain that came with the kit. I had #35 chains and sprockets as spares from other karts and used those so everything matched. Second I didn't pace or radar but I'd say probably 22-24 mph and third has to be pushing 40 mph with me in the kart. I'm about 200 lbs and this kit has no issues moving me around at a good clip. Kids love it, they get about 30-40 minutes out of a Dewalt 60 volt 3 ah (marked as a 9 ah but that uses 20 volt to get that rating) Figured the DeWalt batteries would work as I have several for my power tools and be easier for the kids to charge and swap out. And if buying some they are a lot cheaper then e-bike/e-scooter batteries.
...
show more
Reviewed in the United States on August 5, 2025 by Sasquatch
Size: 48V 2000W
Style: 48V 2000W
The media could not be loaded. I have only received the motor/controller and am in the process of installing this system but it is being put in my own design so it will take a while for a comprehensive review. for now, I thought I would do the review on what I know. The motor and controller came in protective foam wrapping and box adequate for shipping. While there are nicks/scratches on the motor just like the product description states. these are cosmetic and are not going to affect the performance. If it bothers you the motor is nicely polished and a simple buffing can resolve it. I wish they had included mating connectors for everything. These are not STD that I can tell so for my project I will have to cut the ends and remark the cables and would surely void any warranty on the controller. Having mating connectors can prevent that. Once I have my project completed I an probably help supply a schematic that most people may be interested in using. What is odd the brake light and indicator light both show 48V output. That is a high voltage for lights, normal LED/lights for vehicles are 12V so will interesting to see if I can find lights or a way to step that down. Also, it is not clear if that changes to 60V if the SM 48V/60V wire is connected. Also, there is a reversing signal pigtail. Not clear how that is setup, but I assume a simple NO connection will do. I will edit this post as I find out more things, but for now the motor/controller was as expected. EDIT 3/6/2019 Added 2 photos and a video. I am building an Electric mower and using this motor to power. While some will say it is under powered for the job. I intend to show that most electric conversions have been grossly over powering the electric motor. You really do not need that much. First a image of the original mower, had a 18-20hp Twin Cylinder engine that I got after a son drained the oil but had no replacement oil and left with friends. Dad came home and mower yard and burnt engine up. Chassis is in perfect shape. The video shows a test spin, with no load. It was running about 1/4 throttle. As you can see the chain was loose so I did not run it fast. I am working on a chain tension system and better motor mounting. Again, this was only a test. The third picture shows where I made my mistake of only using the bottom mounts, When I put the wheels on the ground the motor and torque literally bent the motor mount. Fixable though. Some points on my setup: 1. I am currently running my mower on (2) 24V - 2ah electric drill batteries connected in series. Once I get the motor mounted and wired I will build a more appropriate battery stack. 2. REVERSE: For reverse all that is needed is to wire a flip switch into the connector. When flipped turning the throttle gives you reverse. It is that simple. That is it for now. Next steps are to look into the braking system and brake lights, ect. Since there are no opposing connectors, I have to replace and rewire all of the connections. Someone asked a question about the throttle graph not working. It DOES. But you have to provide over 42V. If not, it will only display the battery symbol and bottom bar of power. That is the indication that the battery is dead. I am also planning to provide a complete set of plans on using this motor for a conversion if anyone is interested.
...
show more
Reviewed in the United States on January 29, 2019 by Ranbo Ranbo
Size: 72V 3000W
Style: Temperature Sensing Function
Fast cheap motor works good on a razor mx650. Better instructions for the far driver tuning or having the motor and speed control pre setup would give it a 5 star
Reviewed in the United States on October 26, 2025 by kev
Size: 72V 3000W
Style: Temperature Sensing Function 6700rpm
could not get the motor to work right I tried everything i would stay away from this one. Save your money and get the KR5V!
Reviewed in the United States on December 17, 2025 by Katie Adkins
Size: 48V 2000W
Style: 48V 2000W 45A Motor Kit
Great product I have 2 and they work great
Reviewed in the United States on September 5, 2025 by Rocky Cooke
Size: 48V 1600W
Style: 48V 1600W
There are almost no instructions with this kit. The pamphlet which comes with the kit has instructions for 10 other kits so you get maybe a page devoted to the kit you bought. What else is wrong? None of the wires reach. I was rebuilding an electric kart and all the harness stuff which came with the kit was much too short. Thankfully it's not too hard to add some length to the wires and even the connectors aren't all that hard to take apart. This stuff is going on a moving vehicle so I hoped for better quality when it came to the wires and tiny switches. I substituted my own switches for almost all of them. There is no explanation of a charging circuit at all. There's a connector on the motor controller that says something about charging but your guess is as good as mine as far as what it does. I didn't want to guess at it so I built my own charging solution. There is also no explanation for reversing the motor. My kart needs the motor pointing left so it would be running backwards to the standard install. Thankfully another user (thank you ramsey) said you had to swap the green and yellow hall sensor wires and the yellow and blue phase wires and then the motor doesn't realize its running backwards. What's good? The kart flies. I got enough of what I needed to make everything work but it wasn't easy. If you're going to do this project make sure you have a very good idea of what you are doing and what you'll need before you start because waiting for stuff can really take the air out a project. Good luck if you decide to dive in! Edit: even though the bottom of the controller calls out specifically that the brake light is "low level," whatever that means, it's straight battery voltage. I bought a teeny, little golf cart transformer just so I could light a brake light when the pedal is stepped on. Just one more hassle of using this kit.
...
show more
Reviewed in the United States on December 28, 2024 by ACP13