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Kunray

Kunray 72V 5000W Electric Brushless DC Motor Kit Temperature Sensing Motor Electric Go Kart Motor 6900RPM High Speed Motor 100A 24 Mosfet Controller for Razor Dirt Bike, Electric Motorcycles(72V5000W)

    • Based on 102 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Apr 25 – May 17
Order within 13 hours and 24 minutes
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Size: 72V 5000W


Style: Upgraded Brushless DC Motor kit


Features

  • Upgrade Electric DC Motor Basic Parameters: 72V 5000W BLDC Brushless Motor,providing 8.5N.m of torque.Peak Torque:35N.m. rated speed 5000rpm, maximum speed 8000rmb(no-load speed), current 60A(Max80~100A), small size, aluminum body, all copper wire motor. The motor has a temperature sensing function,which can effectively control the motor overheating and prevent the motor damage. The motor kit is made of Class F insulation (155 C) with an IP54 rating to prevent the entry of dust. Even if the motor is used in a muddy place, it can be used without worrying about the normal use of the motor and will not damage the motor.
  • Appearance Upgraded Brushless DC Motor:Kunray KR5V DC motor, the surface of the motor adopts the design of heat dissipation strip and heat dissipation cover. The motor can better heat dissipation in the process of use, which is the rapid cooling of the motor and protects the service life of the motor. We have reserved 4 mounting holes for the base of the motor for you, which will be more convenient and faster during your installation.
  • Internal structure upgrade Electric Kart Motor: KR5V Electric DC Motor Upgrade V-Magnet Rotor 5 Pair Magnet Poles. In the process of your use, you can make the motor play a greater effect and improve the performance of the motor. And is not conducive to damage the motor. Moreover, the Hall sensor is placed on the rear cover of the motor (the rear cover is removable), which can prevent high temperatures and is more convenient when you repair or maintain the motor. Note: As shown in the picture, the three screws are not removable!
  • Sine Wave BLDC Controller:The motor uses the KTY84-130TMP sensor and the te.mperature can be adjusted by a sine wave controller. Equipped with a sine wave brushless controller with temperature sensing function, you can customize and monitor performance for optimal efficiency.
  • 5KW Electric DC Motor Multi-purpose : Electric 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.

Brand: Kunray


Speed: 6900 RPM


Voltage: 72 Volts


Horsepower: 5000 Watts


Material: Aluminum


Package Dimensions ‏ : ‎ 15.35 x 10.75 x 8.98 inches; 12.13 Pounds


Date First Available ‏ : ‎ October 11, 2019


Manufacturer ‏ : ‎ Kunray


Country of Origin ‏ : ‎ China


Best Sellers Rank: #40,887 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #2 in Scooter Motors


#2 in Scooter Motors:


Customer Reviews: 3.7 3.7 out of 5 stars 102 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Apr 25 – May 17

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.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Bolts right on to razor mx650
Review Image by Spencer E. Spencer E.
Want a crazy power house for the second stage of your bike? This is it. Loads of torque to carry that front end in the air and plenty of speed to keep you going. If your coming from an my1020 motor I’d suggest you have some handle bar grips you can keep a hold of lol.
Reviewed in the United States on January 21, 2025 by Spencer E. Spencer E.
    • Good motor and controller
Size: Large Style: 48V 2000W 45A motor kit
The media could not be loaded. Well built on motor/controller. I was having issue but it was my fault. I have figured it out and everything is working correctly. But if you need any support. There is no phone number to call. Contact Kunray via Amazon messaging only and is useless. 6/28/2020 . Top out 41mph on a go kart. Love the sound of this motor. Total weight is about 300bls with driver. PS. A note for those people complaints about the motor/controller. The motor in default is only run on Medium speed @ 80% power. In order to run the motor at 100% full power. You will need to have a speed controller install ( cost $10 on ebay) 1= low @60% power 2= Medium 80% power 3= high 100% power. The motor in default is a soft start controller. To get hard start, you must connect the 2 whites wires together to activate hard start. As of 8/20/21 the kit is still running strong running on maximum voltage of 57 -58 volts battery from the 48v battery source. Most 48v battery fully charged is 54 volts. ... show more
Reviewed in the United States on March 23, 2020 by Bruce
    • Not worth the price, get a better controller and throttle and find a better motor.
Size: Large Style: 48V 2000W 45A motor kit
I bought this kit to upgrade my son's electric dirt bike, an SSR SRZ800. I have learned several valuable lessons from this purchase. 1) the controller is huge for a 45 amp unit, it is absolutely monsterous and was going to be really challenging to fit my application. 2) the controller is soft-start, which doesn't work for a fun dirt bike. 3) the controller is not programmable in any way. 4) The motor is horrible quality, unbalanced, and doesn't go to max rpm. This kit would earn a much better rating from me if there was an ability to program the controller and adjust parameters like direction, soft-start, peak amps, and speeds. So essentially the controller isn't a great value. Now the motor: The motor vibrated a lot and wouldn't run correctly. I tried a better Kelly Controller and it would run up, shut off, and run up again with a hall sensor error. The motor was trying to vibrate off my bench. I took it apart and it was horribly unbalanced. All of these MY1020 motors are made to a price point, but the one I got was garbage. You are much better off sourcing a motor directly and then buying a Kelly or other programmable controller and the throttle separately, it will be cheaper and better. ... show more
Reviewed in the United States on May 26, 2020 by chris
    • Works well
Works great. Some 1020 have brackets, this one does not, so I had to build a bracket for it.
Reviewed in the United States on February 19, 2025 by Customer CB
    • It’s powerful, but pretty ass
Size: 72V 5000W Style: Upgraded Brushless DC Motor kit
it is a very powerful motor. I will give it that, but the motor came with no mounting holes that were compatible with razor the thread for the front sprocket stripped completely when I took the bolt off.
Reviewed in the United States on January 25, 2025 by Amazon Customer
    • No junction box included phase connection. update to 5 stars regardless
Size: Large Style: 48V 2000W 45A motor kit
Review Image by Mad man Mad man
Review Image by Mad man Mad man
Review Image by Mad man Mad man
Review Image by Mad man Mad man
Review Image by Mad man Mad man
Have not used yet . Instructions has phase connector and junction box. Instructional Video also has junction box (5) also. Nothing was included so I had to order from elsewhere cost me another 10 bucks. Update: for those of u whole need to reverse the motor rotation its not bad From the esc hall connector : Splice and connect blue to yellow and yellow to blue. These are 18 gauge thin wires. Picture included From the motor big azz cables yellow to yellow, blue to green Final Update: The phase wires were REALLY hot but this was my own fault as I connected with nut and bolkt. make sure to have a very good connection or you will have resistance =HEAT. At the end I spliced them together with a wire nut which removed the issue. I was worried that the phase wires from the motor were much larger gauge but turned out to be User Error . Motor: I hooked this up on a monster motoE1000 with a 48v 20 AH LifeP04 Battery ( This thing absolutely rips! Im 6ft 235 and I top out around 28 MPH on grass. I rode this next to a Juiced Bike with MPH gauge against my son (125 lb) and we were neck and neck. So far so good, no heat issues, battery is till running strong, seems solid so far. enjoy! ... show more
Reviewed in the United States on May 4, 2020 by Mad man Mad man
    • Metal gear broke within first 5 minutes from start
Size: 72V 5000W Style: Upgraded Brushless DC Motor kit
Review Image by Anna A Anna A
The media could not be loaded. Unfortunately it looks like metal which is used for gear is not good. See picture - gear broke a part within first 5 minutes while bike was on the stand (not even on the road). I will update review after learn how good customer service is and how fast replacement part will arrive. I am changing my rating from one star to three because seller’s customer service so far is very responsive. After exchanging couple pictures they told me that replacement sprockets is on the way to me. No tracking number yet, but so far I have no reasons not to trust them. I will update my review when replacement sprockets will arrive and I will be able to test my upgraded Razor 550. ... show more
Reviewed in the United States on February 17, 2025 by Anna A Anna A
    • Razor EcoSmart Metro Scooter
Size: Large Style: 48V 2000W 45A motor kit
I bought a razor ecosmart metro scooter and upgraded it to 48 volts getting it up to 21mph but over 400 miles I burned out the original motor due to my weight and the extra voltage. So I bought this motor and controller kit for it. I had to drill new holes to mount the motor and install an extra box to house the controller and one of the four 15 Amp hour batteries I bought. You also had to reverse the rotation of the motor by swapping the thick blue and green wires and swapping the tiny blue and yellow wires going to the motor cable. After all that it goes about 16 mph in low, 23mph in medium and 32 mph in high speed. The whole system works great and I'm very glad I purchased it and would recommend it to anyone looking to get extra speed and power out of their scooter. ... show more
Reviewed in the United States on January 2, 2021 by Amazon Customer

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