KR5V V2: A Powerful 72V 5000W Motor Engineered for Performance

 When it comes to building high-performance electric vehicles — from dirt bikes and e-motorcycles to go-karts and custom Razor conversions — the motor is the heart of your machine. The KR5V V2 motor by KUNRAY is built to deliver raw power, mechanical strength, and installation flexibility, making it the ideal choice for performance-focused riders and builders.

Built for Power and Speed

KR5V V2 is a 72V, 5000W motor designed for aggressive performance, fast acceleration, and stable torque output. Whether you're climbing off-road hills or cruising city streets, its performance specs meet the demands of serious riders.

Rated Voltage: 72V DC

Rated Power: 5000W

Rated RPM: 5000 rpm

Peak RPM: 8000 rpm

Rated Current: 60A

Peak Current: 80–100A

Torque: 8.5 N·m (rated), up to 35 N·m (peak)

With air-cooling and a durable construction weighing only 5.5kg, this motor is optimized for power-to-weight balance and thermal efficiency.

Engineered for Strength and Stability

KR5V V2 is equipped with a 17mm motor shaft, giving it excellent torsional strength for high-stress environments like trail riding, stunts, or heavy acceleration.

Its reinforced mounting design features 8mm thick case edges at both the front and rear installation points — ensuring the motor stays securely mounted during intense use or high-vibration conditions.

Flexible Sprocket Options

Customization is easy with KR5V V2. It supports multiple sprocket types to fit a variety of builds and chain setups:

#35 9T

#35 11T

420 -10T

Whether you're focused on torque for hill climbs or higher speed ratios for track use, KR5V V2 gives you the freedom to choose the drivetrain configuration that suits your needs.

Compatible chains:

Use #35 sprockets with #35 chains

Use 420 sprockets with 420 chains

Sensor & Build Features

KR5V V2 comes with integrated components for easy controller integration and thermal management:

Hall Sensor for precise motor control

Temperature Sensor: KTY84-130 for real-time thermal monitoring

Class F insulation (155°C)

IP54 protection against dust and splashes

8mm phase wires for efficient power delivery

Multiple sprocket fitments: #35 9T, #35 11T, or 420 -10T

It’s a ready-to-install, high-performance solution for electric vehicle builders who want confidence and control from day one.

Ideal for High-Performance Applications

KR5V V2 is designed for:

DIRT BIKES

E-MOTORCYCLES

GO-KARTS

RAZOR conversions like MX500, MX650, SX500, RSF650

Custom DIY builds that demand high torque and speed

Whether you're a performance enthusiast, a hobbyist builder, or upgrading a commercial electric vehicle — KR5V V2 offers a versatile and dependable motor solution.

Ready to Power Up Your Ride?

KR5V V2 combines performance, durability, and installation flexibility in one powerful package.

Take your ride to the next level with a motor built for power, control, and customization.