Ventus Ryuga 81kW Motor | By Ventus Bikes VTB | For Sur Ron Ultra Bee

Overview

The Ventus Ryuga 81kW Hairpin Motor is the ultimate no-compromise performance upgrade for the Sur Ron Ultra Bee. Engineered specifically around the Ultra Bee chassis, this motor installs as a true plug-and-play replacement with no modifications required. When paired with the Ventus Aetos V9600 controller, it unlocks over 81 kW of peak power and up to 114 Nm of torque for instant response, extreme acceleration, and precise control at every speed.

Designed for riders who demand maximum output, durability, and razor-sharp throttle behavior, the Ryuga 81kW turns the Ultra Bee into a competition-grade EMoto with performance far beyond factory limits.

Technical Specifications

• Peak Power: 60.3 kW at 72V, 81 kW at 96V 

• Peak Torque: 114 Nm at 1400A, 73 Nm at 850A 

• Protection Rating: IP67 water and dust sealed

• Pole Pairs: 4

• Max Efficiency: 95 percent

• Insulation Class: 250°C

• Temperature Sensor: NTC 10k B3905

• Position Sensor: Encoder ABZP

• Cooling Method: Natural air cooling

• Tested Top Speed: 180 km/h at 72V, 195 km/h at 96V (46T sprocket, 62.5 cm wheel) 

• Weight: 12.5 kg

• Dimensions: Φ173 × 180.8 mm

• Phase Wire Gauge: 35 mm²

• Max RPM: 14,000 rpm

• KV Value: 118

• Motor Type: Hairpin winding

• Product Model: RGA81

• Compatible Bikes: Ultra Bee only

Performance Highlights

The Ryuga 81kW’s performance curves on page 3 show massive torque available from near-zero RPM with extremely stable power delivery through mid and high ranges. Efficiency maps confirm high efficiency up to 95 percent across real riding conditions. 

• 92.8 Nm torque available as low as 500 rpm

• Over 60 kW at 72V and 80+ kW at 96V

• High efficiency throughout 2,000–12,000 rpm range

• Designed to maintain power under continuous load

Why Choose the Ryuga 81kW?

• Built specifically for the Ultra Bee platform

• True plug-and-play fitment—no fabrication or adapters

• Hairpin stator technology for maximum power density

• High RPM ceiling for extended high-speed riding

• High phase wire gauge (35 mm²) for extreme current handling

• Fully sealed IP67 construction for wet and dusty environments

Fitment

• Sur Ron Ultra Bee

Fitment: Ventus Ryuga 81kW Motor| for Surron Ultra bee |By Ventus Bikes VTB

• Surron Light Bee X

• Segway X260

• 79bike Falcon-M

• Talaria XXX

• Segway X160

• Eride Pro

• Eride pro SS

• Surron Ultra Bee

• Surron Light bee S

• Talaria Sting MX5

• Rerode R1

• Eride pro S

• Eride pro SS 2.0

• Eride pro SS 3.0

• Eride pro SR

• Ventus one

• Ventus one+ plus

• Rerode Ewatt 2.0

This product may be compatible with more models than shown above. Please see the product description for full details, or contact us for help with fitment.