Extreme Electric Performance

 

The Ventus Ryuga 81kW Motor is the pinnacle of electric moto performance, engineered exclusively for the Sur Ron Ultra Bee.  Delivering instant torque and race-proven reliability, this motor transforms the Ultra Bee into an absolute beast—capable of dominating tracks, trails, and competitive racing environments.

 

Built for riders who demand the absolute maximum from their machine, the Ryuga 81kW combines extreme power output with advanced thermal management, premium construction, and full tunability via Ventus Aetos controllers.

 

Technical Specifications

 

Specification	Details
Peak Power Output	81kW
Continuous Power	45kW rated
Voltage Range	80V–120V compatible
Peak Current	1200A motor phase current
Cooling System	Advanced liquid cooling with extreme thermal capacity
Construction	CNC-machined aluminum housing, premium copper windings
Weight	Approximately 22 lbs
Compatibility	Sur Ron Ultra Bee (exclusive fitment)
Mounting	Direct drop-in replacement for Ultra Bee
Warranty	2-year manufacturer warranty
Controller Requirement	Requires Ventus Aetos V9600 MAX or ULTRA controller

 

What kind of crazy power is this?

 

Competitive Racers

Professional and amateur racers who need maximum power, instant throttle response, and consistent performance across multiple race sessions. The Ryuga 81kW delivers podium-level output.

 

Extreme Performance Enthusiasts

Riders building the ultimate Sur Ron Ultra Bee setup—maximum acceleration, top speed, and power delivery. This motor is the foundation for extreme builds.

 

Track Day Warriors

Riders who demand race-level performance for track days, timed events, and competitive riding. The Ryuga 81kW handles sustained high-output use with thermal stability.

 

Advanced Builders

Custom builders creating 100V+ high-voltage systems who need a motor capable of handling extreme power, advanced tuning, and professional-grade performance.

 

Ultimate Ultra Bee Upgrade

 

Extreme Power Output  81kW peak power delivers 108+ HP equivalent with instant torque from zero RPM. Acceleration is brutal, controllable, and fully adjustable via Ventus Aetos controllers.

 

Premium Construction  CNC-machined aluminum housing, high-grade copper windings, precision-balanced rotor, and race-proven components ensure durability and reliability under extreme loads.

 

Direct Ultra Bee Fitment  Engineered specifically for Sur Ron Ultra Bee. Direct drop-in replacement with professional installation for proper alignment, system integration, and safety verification.

 

Fully Tunable Performance  Pair with Ventus Aetos V9600 MAX or ULTRA controllers for complete control over power delivery, throttle response, field weakening, regenerative braking, and thermal management.

 

Configurations

 

High-Performance Track Setup (80V)

• Motor: Ventus Ryuga 81kW

• Controller: Ventus Aetos V9600 MAX (72V–96V)

• Battery: 80V 50Ah (19kW/32kW rated)

• Best For: Track racing, competitive events, aggressive riding

• Power Output: 65–75kW peak, extreme torque, race-level acceleration

 

Extreme Racing Build (96V)

• Motor: Ventus Ryuga 81kW

• Controller: Ventus Aetos V9600 ULTRA (100V+)

• Battery: 96V 50Ah (32kW+ rated)

• Best For: Professional racing, maximum performance, podium builds

• Power Output: 75–81kW peak, ultimate acceleration, highest top speed

 

Ultimate High-Voltage Setup (120V)

• Motor: Ventus Ryuga 81kW

• Controller: Ventus Aetos V9600 ULTRA (100V+)

• Battery: 120V 40Ah (40kW+ rated)

• Best For: Extreme custom builds, maximum output, advanced tuning

• Power Output: 81kW sustained, ultimate performance, cutting-edge setup

 

Compatibility 

 

Compatible E-Motos

• Sur Ron Ultra Bee

 

Compatible Controllers

• Ventus Aetos V9600 MAX (72V–96V) – Recommended for 80V–96V builds

• Ventus Aetos V9600 ULTRA (100V+) – Recommended for 96V–120V extreme builds

 

Compatible Batteries

• 80V 40Ah–50Ah (high performance)

• 96V 40Ah–50Ah (extreme performance)

• 120V 30Ah–40Ah (ultimate performance)

• Must be rated for 400A+ continuous discharge

 

FAQ

 

Q: Is the Ryuga 81kW only for the Ultra Bee?  A: Yes, the Ryuga 81kW is engineered specifically for the Sur Ron Ultra Bee. It is not compatible with Light Bee, Talaria, or other models. For those bikes, see the Ryuga 52kW motor.

 

Q: What controller do I need?  A: You must use a Ventus Aetos V9600 MAX (72V–96V) or ULTRA (100V+) controller. The MAX is recommended for 80V–96V builds, and the ULTRA for 96V–120V extreme setups.

 

Q: How much power will I actually get?  A: Peak output depends on your battery voltage and controller. With an 80V system and MAX controller, expect 65–75kW. With 96V and ULTRA controller, 75–81kW sustained output.

 

Q: Do I need upgraded cooling?  A: The Ryuga 81kW includes advanced liquid cooling. For extreme racing and sustained high-output use, we may recommend additional cooling upgrades—we'll advise during consultation.

 

Q: Can I install this myself?  A: Installation requires advanced mechanical skills, proper tools, and understanding of high-voltage systems. We strongly recommend professional installation to ensure safety, alignment, and system integration.

 

Q: What's the warranty?  A: 2-year manufacturer warranty covers defects and failures under normal use. Racing and extreme use may have specific warranty terms—contact us for details.

 

Q: Will this work with my stock Ultra Bee battery?  A: The Ryuga 81kW requires a high-discharge battery rated for 400A+ continuous. Stock batteries may not provide sufficient current for full power output. We recommend upgrading to a Ventus high-voltage battery system.

 

Q: How does this compare to the 52kW motor?  A: The 81kW is significantly more powerful and is designed exclusively for the Sur Ron Ultra Bee. The 52kW is for Light Bee, Talaria, and similar bikes. The 81kW delivers ultimate performance for extreme builds.