The Torp TM40 Pro is a high-power mid-drive (center drive) traction motor built specifically for the Sur-Ron Light Bee electric off-road bike. The motor uses an IPM (interior permanent magnet) PMSM architecture and targets high RPM with very high phase current capability.
This TM40 Pro setup reaches 50 kW peak power and 86 Nm max torque, with efficiency up to 95%. The motor includes an encoder position sensor with 1024 (4096) points and also supports a Hall sensor (Hall), which keeps it compatible with Torp TC1000 motor controller (inverter) and suitable for other aftermarket controllers.
The TM40 Pro is engineered for maximum output through a thick winding, a wide magnet package, and extremely low 2.4 mΩ motor resistance. The housing meets IP67 protection class based on lab testing in distilled water, and the motor is designed in the EU.
Benefits
- 50 kW peak power – the TM40 Pro delivers 50 kW peak output for Sur-Ron Light Bee powertrain upgrades.
- 19 kW continuous power – the motor sustains 19 kW continuous power for longer load periods.
- 1100 A max phase current – the 1100 A capability supports high-current FOC control with compatible inverters.
- 86 Nm maximum torque – the motor reaches 86 Nm max torque for aggressive acceleration demands.
- 48 Nm at 500 A – the torque rating at 500 A is specified at 48 Nm for current-based tuning work.
- 2.4 mΩ motor resistance – the 2.4 mΩ resistance is designed for low electrical losses under high current.
- 35 mm² phase cable cross-section – the 35 mm² phase cross-section supports the motor’s high-current operating range.
- Encoder + Hall sensor support – the 1024 (4096) encoder resolution and Hall option broaden controller compatibility beyond TC1000.
Who is this for
This motor is for the Sur-Ron Light Bee electric off-road motorcycle when a mid-drive motor replacement is needed. The same fitment also targets riders planning a full powertrain (powertrain) upgrade on the Sur-Ron Light Bee platform.
The TM40 Pro matches drivetrain setups that rely on high RPM and high phase current. The motor is commonly selected when top speed is a key priority and when tuning focuses on strong acceleration for drag-style riding.
The motor is compatible with the Torp TC1000 motor controller (inverter). The built-in encoder support aligns with Torp controllers, while Hall sensor support helps integrate the motor with other aftermarket controllers.
Package contents
- Torp TM40 Pro motor (mid-drive mounting)
- User manual
Technical specs
| Category | Specification | Value |
|---|---|---|
| Motor type | Architecture | IPM PMSM (interior permanent magnet) |
| Application | Drive format | Mid-drive (center drive) traction motor |
| Compatibility | Motorcycle fitment | Sur-Ron Light Bee |
| Power | Peak power | 50 kW |
| Power | Continuous power | 19 kW |
| Current | Max phase current | 1100 A |
| Torque | Max torque | 86 Nm |
| Torque | Torque at 500 A | 48 Nm |
| Electrical | Motor resistance | 2.4 mΩ |
| Wiring | Phase cross-section | 35 mm² |
| Sensing | Position sensor | Encoder |
| Sensing | Encoder resolution | 1024 (4096) points |
| Sensing | Additional sensor support | Hall sensor (Hall) |
| Efficiency | Efficiency (max) | Up to 95% |
| Ingress protection | Protection class | IP67 (lab tested in distilled water) |
| Design | Design origin | Designed in the EU |
| Controller compatibility | Supported controller | Torp TC1000 motor controller (inverter) |
Why choose
The TM40 Pro focuses on output density through concrete electrical choices. The motor combines a thick winding and a wide magnet package with 2.4 mΩ resistance, which supports high-current tuning and fast response under load.
Control flexibility comes from the sensor set. The encoder provides precise rotor position feedback at 1024 (4096) points, while Hall support keeps the motor viable for non-Torp aftermarket controller builds. The TC1000 compatibility also makes it a direct match for Torp inverter-based upgrades.
Durability priorities are reflected in the housing. The IP67 rating is declared from lab testing in distilled water, and the overall design work is EU-based. The mid-drive format also keeps the motor aligned with Sur-Ron Light Bee drivetrain layouts.
FAQ
Is the Torp TM40 Pro compatible with the Sur-Ron Light Bee?
- The TM40 Pro is designed for the Sur-Ron Light Bee as a mid-drive (center drive) traction motor.
- The product targets Sur-Ron Light Bee motor replacement and powertrain upgrade use.
Will this motor work with the Torp TC1000 controller (inverter)?
- The TM40 Pro is compatible with the Torp TC1000 motor controller (inverter).
- The motor’s encoder support aligns with Torp controller requirements.
What sensors does the TM40 Pro use for commutation and feedback?
- The position sensor is an encoder with 1024 (4096) points of resolution.
- The motor also supports a Hall sensor (Hall) for broader aftermarket controller options.
How much power and torque does the TM40 Pro deliver?
- The motor reaches 50 kW peak power and 19 kW continuous power.
- The motor is rated at 86 Nm max torque, with 48 Nm at 500 A.
What phase current and wiring does the motor support?
- The TM40 Pro specifies 1100 A max phase current for high-current control strategies such as FOC.
- The phase wiring uses a 35 mm² phase cross-section to suit the current range.
Is the motor sealed for wet and dusty riding?
- The housing meets IP67 protection class.
- The IP67 declaration is based on laboratory testing in distilled water.
Is the TM40 Pro aimed at torque riding or top speed builds on the Sur-Ron Light Bee?
- The TM40 Pro is often chosen when top speed is a key priority on the Sur-Ron Light Bee.
- The TM40 Pro focus also suits acceleration-heavy, drag-oriented tuning.
The Torp TM40 Pro is a Sur-Ron Light Bee-focused mid-drive motor that combines IPM PMSM design, encoder feedback, and very high phase current capability in a sealed IP67 housing.
Search terms: Torp TM40 Pro motor, mid-drive motor (center drive motor), Sur-Ron Light Bee motor upgrade, IPM PMSM traction motor, TC1000 inverter compatible motor, encoder 1024 4096, Hall sensor motor, 50 kW peak power electric dirt bike motor.
