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

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