Yes! The KR5V just evolved to KR5V V2 – stronger sprockets, smarter service, same beastly power!
Looking to upgrade your electric dirt bike or go-kart with more torque, higher reliability, and smoother control? Meet the KR5V V2, the newly enhanced version of KUNRAY’s popular 5000W BLDC motor. With improvements that make it easier to install, stronger in performance, and smarter for service, this motor is ready to power your next adventure.
Table of contents：
Why Choose KR5V V2 for Your Electric Build?
The KR5V V2 is a high-performance brushless DC motor designed for a wide range of electric vehicles, including:
It’s especially popular among DIY builders and EV modders for its high power output and compatibility with 72V systems.
While the internal specs remain the same as the original KR5V, they continue to deliver outstanding performance:
| Brand | KUNRAY |
| Rated power | 72V 5000W |
| 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 |
| Sprocket | #35 9T/#35 11T/420-10T |
The KR5V V2 isn’t just a cosmetic refresh—it includes three important upgrades for better performance and after-sales experience:
The motor shaft has been resized for improved compatibility and strength. The sprocket diameter has also been increased, and the sprockets themselves are now stronger, making the motor more durable under high torque conditions.
Previously, the KR5V only supported a single #35 sprocket. Now, the V2 version supports(Sprocket changes the corresponding chain will also change):
This gives users more flexibility for different vehicle setups and performance tuning.
A new manufacturer code has been added on the case, helping with faster product identification, troubleshooting, and better after-sales service.
Whether you’re upgrading an old ride or building a new custom e-bike, the KR5V V2 gives you the power, flexibility, and reliability you need.
Q: Can I install the KR5V V2 on my Razor MX650?
Yes! The KR5V V2 is a great match for MX650 and similar models with 72V systems.
Q: What’s the difference between KR5V and KR5V V2?
The V2 version adds a manufacturer code, larger shaft size, stronger sprockets, and more sprocket options.
Q: Is the KR5V V2 waterproof?
It has an IP54 rating, meaning it’s protected against dust and light water spray—ideal for most off-road use.
The KR5V V2 is available now. Whether you’re replacing a stock motor or building your dream e-motorcycle, this 72V 5000W powerhouse delivers unmatched performance.
[Order now] for more details.
