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Kunray KR5V V2 72V 5000W New Upgrade Electric Brushless Motor Kit For Electric Motorcycle Razor Dirt Bike With 100A Fardriver Controller Bluetooth Built-in Half Handlebar LED Voltage Display Throttle #35 Chain Set

Name: Kunray KR5V V2 72V 5000W New Upgrade Electric Brushless Motor Kit For Electric Motorcycle Razor Dirt Bike With 100A Fardriver Controller Bl
Brand: Kunray Electric
Price: 429 USD
Availability: InStock
Rating: 4.9 (22 reviews)

The KUNRAY KR5V V2 is a next-generation 72V 5000W high-performance brushless motor engineered for Dirt Bikes, E-Motorcycles, Go-Karts, and Razor MX / SX series vehicles.With a reinforced motor shaft, upgraded housing, and expanded sprocket compatibility, the KR5V V2 delivers explosive torque, superior durability, and stable power output—perfect for high-demand electric vehicle builds and performance upgrades.
One Kit, Zero Hassle. No guessing, no tuning headaches, All-in-One Kit for Beginners.The kit Includes motor NS18 Bluetooth controller, sprocket options, and essential accessories ( don't include battery )
Mounts directly into Razor MX650, MX500, SX500, Indian650,RSF650 chassis without modification.Ideal for Dirt Bike, Go-Kart, Electric Motorcycle conversions.
With 6.0 Gear Ratio We are Hitting 60MPH at Full Battery on 72 Volt with 100 Line Amps ( Can Vary Depending on Riders Weight, Wheel Size, Chain Size, Tire Size, and Train.
Load Weight: About 100-200kg.
#35 9T/#35 11T/420 -10T Sprocket Can Provided.
The KR5V in compatibility with Kelly, Fardriver, and most controllers.
The NS18 fardriver controller suit for 3-5KW motors.Compatible with the KR5V motor，QS Motor and most BLDC motors, the NS18 delivers smooth acceleration, strong torque output, and excellent riding stability.
US,AU, SOME EU COUNTRY No tax, free shipping .

4.9 (22 Reviews)

156 Sold

~~$490.00~~ $429.00

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KR5V V2:

72V5000W LED Throttle Set

72V5000W Pedal Set

72V5000W Blue Throttle Set
Sprocket:

#35 -9T

#35-11T

420-10T

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Description

KR5V
Rated Voltage	72V
Rated Watt	5000W
Peak Power	10KW
Rated RPM	5000RPM
Peak RPM	8000RPM
Rated Current	60A
Peak Current	80A-100A
Torque N.m	8.5N.m
Peak w.m	35N.m
Poles	5pair /10pcs
Sensor	Hall sensor
TMP Sensor	KTY84-130
Class	F(155℃)
IP	IP54
Cooling	Air cooling
Phase wire	8mm²
NS18 Fardriver controller
Rated Power	3000–5000W
Rated Voltage	48–72V
Rated Current	100A
Protect Phase Current	300A
Waterproof Grade	IP67
Bluetooth	Built-in
Net Weight	1.9KG
Compatibility	Works with KR5V ,QS Motor and most BLDC motors

⚠️Note：If you want to match with new brand motor, some parameters should be tested by yourself. It maybe need Program again , and must download the APP, and buy fardriver bluetooth.

● Android Download Address:http://182.92.233.85:6868/FarDriverSigned.apk

● Apple: Search for "Fardriver" in the APP Store

● ND controller manual download way:

https://kun-ray.com/u_file/2311/01/file/Fardriver-ND-Controller-instructions.pdf

Packing list:

1.KR5V V2 motor
2.NS18 Fardrivver Controller（Bluetooth built-in）
3.LED Throttle ，pedal or 3-speed throttle（choose 1 of the 3）
4.Chain，Tooth and sprocket（#35 9T/#35 11T/420 -10T Sprocket Can Provided）
The specific packing is subject to the SKU Diagram

🚴Latest upgrade
✅We have upgrade the NEW MOTOR CASE in Sep 2025,if your motor case use some month the rear case have broken , please contact us for get new for free.( your Orders received within 6month)
✅We have change the Shaft size, Sprocket diameter becomes larger,Sprockets will be stronger.
✅#35 9T/#35 11T/420 -10T Sprocket Can Provided
✅Add manufacturer codes on the case,better for after-sales service.
✅ Bluetooth buit-in.

🔥About the Kunray KR5V
The KUNRAY KR5V V2 is a next-generation 72V 5000W high-performance brushless motor engineered for Dirt Bikes, E-Motorcycles, Go-Karts, and Razor MX / SX series vehicles. With a reinforced motor shaft, upgraded housing, and expanded sprocket compatibility, the KR5V V2 delivers explosive torque, superior durability, and stable power output—perfect for high-demand electric vehicle builds and performance upgrades.
Mounts directly into Razor MX650, MX500, SX500, Indian650,RSF650 chassis without modification. Ideal for Dirt Bike, Go-Kart, Electric Motorcycle conversions.
BLDC Motor: Brushless High Speed Mid Drive Motor, Voltage 72V DC, Rated Power 5000W , Peak Power 10kw. Current 60A, Rated Speed 5000rpm/min, (Max 8000RPM).Torque N.m: 8.5N. m,Peak N.m: 35N.m
With 6.0 Gear Ratio We are Hitting 60MPH at Full Battery on 72 Volt with 100 Line Amps ( Can Vary Depending on Riders Weight, Wheel Size, Chain Size, Tire Size, and Train.）Load Weight About 100-200kg.
Kunray KR5V V2 New upgrade Brushless Motor Features: Electric Brushless DC Motor, Aluminum Body, Full Copper Coil, Heat Resistant, Naturally Air Cooled, Low Noise High Quality More Long Life.
Brushless DC Motor With KTY84-130 Temperature Sensor, 8mm²PHASE WIRE.
Works well with 60-100A controller.
In compatibility with Kelly, Fardriver, and other controllers.
If you’re seeking a high-torque, high-power motor that’s built for both performance , the KR5V V2 is a standout choice in the IPM (Interior Permanent Magnet) motor category—efficiency, response, and reliability

🚀About the NS18 controller
- The KUNRAY NS18 FarDriver Controller is a high-performance sine wave BLDC controller with self-learning function.designed for electric motorcycles, dirt bikes, and other EV upgrades.
- It features built-in Bluetooth, supports both Android and iOS apps, and allows users to customize power, speed, and performance settings in real time.
- Suit for 3-5KW motors. Compatible with the KR5V motor，QS Motor and most BLDC motors, the NS18 delivers smooth acceleration, strong torque output, and excellent riding stability.

📌Additional Notes
√ When the motor is installed on the left side and requires counterclockwise rotation, the wiring configuration shall be as follows:

PHAGE WIRE:

yellow to yellow

blue to green

green to blue

HALL WIRE:

red - red

black - black

green - green

yellow - blue

blue - yellow
√ If you need to use the reverse function, you must enable it in the FARDRIVER APP.Please set the parameters according to the following image.（Using the Kunray NS18 as an example, the parameters should be set as follows.）

⚠️Important Notes

Do NOT exceed 150°F (65°C) motor temperature to avoid damage.
Real-world performance varies based on rider weight, wheel size, tire type, sprocket ratio, and terrain.

NOTE:
the motors are designed for off-road use only. Be sure to check local laws before riding. kunray is not liable for any consequences due to unlawful use. Always yield to pedestrians and obey traffic regulations. Riding on sidewalks may be prohibited—please check your local laws.
After-Sale Serives:

You can feel free contact us:

Email:buyersupport@cnkunray.com

FAQ

What is the Kunray 48V 2000W Brushless Motor Kit？

This product is a 48v 2000w motor kit designed for electric vehicle conversion projects. It includes a 48 volt brushless motor and a matched 2000w motor speed controller, suitable for electric scooters, go karts, and compatible DIY electric bike applications.

Why choose a brushless motor instead of a brushed motor？

An electric brushless DC motor offers higher efficiency, smoother operation, and lower maintenance compared to brushed motors. With no physical brushes to wear out, energy loss is reduced, making this motor kit a more reliable and environmentally friendly option for long-term electric use.

How does the 2000W motor speed controller work？

The included 2000w motor speed controller regulates power flow from the battery to the motor. It helps deliver stable acceleration, protects the motor from current overload, and improves overall energy efficiency, ensuring safer and smoother riding performance.

What vehicles can this motor kit be used for？

This 48v motor kit 2000w is commonly used for electric scooters, go karts, and personal mobility projects. It can also support certain DIY e-bike conversions when the frame, battery, and drivetrain are compatible with the motor’s output requirements.

How does this motor kit support eco-friendly transportation？

By replacing gas-powered engines, the 48v scooter kit produces zero exhaust emissions and operates with lower noise. The efficient brushless design reduces energy waste, helping riders lower their environmental impact while enjoying electric mobility.

Can this motor be used with different voltage setups？

The motor platform is often compared with projects such as a 60v 2000w e bike motor kit or 72v brushless motor kit, but proper controller and battery matching is required. Users should always follow recommended voltage specifications to ensure safe operation and long motor life.

Is this motor kit suitable for beginners？

This kit is popular among DIY enthusiasts. Basic knowledge of electric wiring, mounting, and battery systems is recommended. For first-time users, professional installation or technical guidance can help ensure correct setup.

How do I maintain a brushless motor kit？

Brushless motors require minimal maintenance. Keeping electrical connections clean, ensuring proper cooling, and avoiding water exposure during operation will help extend the lifespan of the 48 volt brushless motor and controller.

Why is 48V a popular choice for electric motor kits？

A 48V system offers a balance between power output and energy efficiency. It delivers strong performance for personal electric vehicles while maintaining manageable battery size, weight, and safety characteristics.

What makes Kunray motor kits a reliable choice？

Kunray focuses on electric drive solutions designed for consistent output and compatibility with common electric vehicle platforms. This 48v motor kit is built to support stable performance, efficient energy use, and practical conversion needs for retail customers.

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Kunray KR5V V2 72V 5000W New Upgrade Electric Brushless Motor Kit For Electric Motorcycle Razor Dirt Bike With 100A Fardriver Controller Bluetooth Built-in Half Handlebar LED Voltage Display Throttle #35 Chain Set

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Kunray KR5V V2 72V 5000W New Upgrade Electric Brushless Motor Kit For Electric Motorcycle Razor Dirt Bike With 100A Fardriver Controller Bluetooth Built-in Half Handlebar LED Voltage Display Throttle #35 Chain Set

Quantity:

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