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VTB BEAST 48kW (BST48)
The VTB Beast motor for Ultra Bee is the very definition of brute force. Designed with proven traditional winding ("Round Wire") technology, it is optimized to deliver a colossal torque of 85 Nm and an impressive peak power of 48kW (at 96V). It's the ideal upgrade to transform your Ultra Bee into a torque monster, perfect for technical terrain and massive accelerations.
Its internal design guarantees reliability: an IPM (Internal Permanent Magnet) rotor, a high-strength steel shaft (40CrMoTi), and windings protected by VPI technique. Coupled with an IP65 protection rating, it is ready to face the worst conditions. For surgical control precision, it features an ABZP Encoder sensor, far superior to Hall sensors.
The Beast is the perfect motor for riders looking to maximize torque and power in a reliable and proven way.
Complete Technical Specifications (Beast 48kW):
- Model: BST48
- Technology: "Round Wire" Winding
- Peak Power: 37.8kW (@72V) | 48kW (@96V)
- Max Torque: 85 Nm (@1250A) | 45 Nm (@560A)
- Operating Voltage: 48-100V
- Max Phase Current: 1250A (torque data, to be confirmed if it's the absolute max)
- Max RPM: 10000 RPM
- KV Value: 91.6
- Max Efficiency: 93%
- Protection Rating: IP65
- Weight: 13.21 kg
- Dimensions: Ø180mm x 196.3mm
- Position Sensor: ABZP Encoder
- Temperature Sensor: NTC 10k B3905
- Insulation Class: 155°C
- Number of Pole Pairs: 5
- Phase Cables: 35mm²
- Max Speed Tested: 160km/h (@72V) | 200km/h (@96V) (with 46t sprocket, Ø62.5cm wheel)
- Color: Grey
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VTB RYUGA 81kW (RGA81)
The VTB Ryuga motor is the ultimate weapon for the Sur-Ron Ultra Bee. It stands out with its "Hairpin" winding technology, an innovation that allows for superior power density and efficiency. The result is undeniable:
- Stratospheric Performance: The Ryuga delivers an astounding peak power of 81kW and a monstrous torque of 114 Nm. This power propels the Ultra Bee into the league of large displacement internal combustion motorcycles.
- Superior Efficiency (95%): Less energy loss and better heat dissipation, crucial for maintaining extreme performance over time.
- Endless Reach: Capable of reaching 14000 RPM, the Ryuga offers significantly higher top speed and revving capability.
- Lighter: Despite its insane power, the Ryuga is lighter (12.5 kg) than the Beast, offering the best possible power-to-weight ratio.
With its IP67 waterproof rating, superior insulation class (250°C), and ABZP Encoder sensor for absolute precision, the Ryuga is the definitive choice for competition and riders who want to build the fastest and most powerful Ultra Bee possible.
Complete Technical Specifications (Ryuga 81kW):
- Model: RGA81
- Technology: "Hairpin" Winding
- Peak Power: 60.3kW (@72V) | 81kW (@96V)
- Maximum Torque: 114 Nm (@1400A) | 73 Nm (@850A)
- Operating Voltage: 48-100V (to be confirmed, not specified but logical)
- Max Phase Current: 1400A (torque data, to be confirmed if this is the absolute max)
- Max RPM: 14000 RPM
- KV Value: 118
- Max Efficiency: 95%
- Protection Rating: IP67
- Weight: 12.5 kg
- Dimensions: Ø173mm x 180.8mm
- Position Sensor: ABZP Encoder
- Temperature Sensor: NTC 10k B3905
- Insulation Class: 250°C
- Number of Pole Pairs: 4
- Phase Cables: 35mm²
- Max Speed Tested: 180km/h (@72V) | 195km/h (@96V) (with 46t sprocket, Ø62.5cm wheel)
- Available Colors: Black, Grey, Silver, White, Blue, Green, Purple, Orange.

"Jo & Will's Word"
The Ultra Bee is already a very capable base, but for those who, like us, always think "what if...", the VTB combo is the ultimate answer.
The Beast 48kW already transforms it into a machine that rivals large displacement bikes. The torque is simply monstrous; it's a force of nature that rips your arms off with every acceleration. This is the choice for raw, torquey power.
The Ryuga 81kW? That's a whole new dimension. We're talking about figures that were unimaginable on an eMoto just a year ago. The "Hairpin" technology gives it an explosive character that never stops pushing, all the way to 14000 RPM. It's lighter, more powerful, just more everything. This is the choice for absolute performance, without compromise.


