KR5V Kunray 72V 5000W Upgrade Brushless DC Motor for Razor Electric

he Kunray KR5V 72V 5000W brushless DC motor is a high-performance, mid-drive motor designed as a significant upgrade for specific Razor electric dirt bikes, offering increased power and speed. It is not compatible with all Razor models and requires a complete conversion kit, including a 72V battery and a compatible controller.

• Razor Model Compatibility: The motor is designed to mount directly into the chassis of several specific Razor models without modification, including the Razor MX650, MX500, SX500, Indian650, and RSF650. For other models or applications (like scooters), fabrication may be required.
• Power and Performance: The motor has a rated power of 5000W and can reach a peak power of 10KW, with a rated speed of 6800 RPM (peak 8000 RPM). This provides significant performance enhancements over stock Razor motors, with some users reporting speeds around 60 MPH depending on gearing and battery.
• Design and Durability: It features a full aluminum body, pure copper core, air cooling system, and an external Hall sensor to prevent burnout, enhancing its reliability and lifespan.
• Required Components: Upgrading to this motor is a full conversion that requires additional high-power components, including a 72V battery (not included in the basic motor purchase) and a compatible 80-100A programmable BLDC controller (such as a Fardriver controller). The stock Razor components are not compatible with this 72V 5000w system.