The motor is usually the second thing you change, after the controller — and it is a far more consequential decision, because it determines what kind of bike you will be riding for the next few years. It isn't about which motor is the most powerful. It is about which one has a power delivery that suits the way you ride.
Torque down low or revs up top — that is the whole question
Two motors with identical peak power can ride completely differently. What decides it is where in the rev range their torque sits.
- A torque motor (slower winding, lower Kv) pulls from zero. It works brilliantly on technical trails, climbs, in stunt riding and in town. Top speed is lower.
- A revving motor (faster winding, higher Kv) wakes up higher, but spins faster and gives a higher top speed. It makes sense on a track, in motocross and in drag runs.
In practice: if you spend most of your time in the woods between trees, a revving motor will wear you out. If you ride in open terrain and speed matters — a torque motor will hold you back.
What Kv means
Kv is the number of rpm per volt. A 95 Kv motor at 72 V spins more slowly than a 105 Kv motor at the same voltage — but at the same current it produces more torque. This is one of those figures that looks like a detail on a product page and in reality decides the character of the whole machine.
The motors available at JGR compared
The motors are listed from the entry point of the range upwards.
| Motor | Peak power | Character | Price bracket |
|---|---|---|---|
| Torp TM25 | up to 31 kW (with the TC1000) | all-round, light | entry |
| Torp TM40 Pro | up to 50 kW | extreme | mid |
| EBMX XLB-60 Core | approx. 41 kW | torque down low | upper mid |
| EBMX XUB-80 | 50 kW | Ultra Bee V2 | top |
| EBMX XLB-60 Race | approx. 42 kW | revs and speed | top |
Torp TM25 — the most sensible first motor
The Torp TM25 is the motor you buy when the standard unit has stopped being enough but you aren't yet building a no-compromise machine. It is light, it is the entry point of the range — see the current price on the product page — and, paired with the Torp TC1000 2.X, it gives up to 31 kW.
For most people riding recreationally, 31 kW in a bike weighing a little over 50 kg is far more than they can use.
Torp TM40 Pro — only for a properly thought-out build
The Torp TM40 Pro produces up to 50 kW and is the top model in the Torp range. But it needs saying clearly: this motor requires a comprehensive upgrade of the bike, not just a change of unit.
For safe use you need, as a minimum: a strengthened chain and sprockets, a more capable braking system, a TC1000-class controller and a battery able to deliver the required current. 50 kW is many times beyond the specification of a standard Sur-Ron — a badly prepared bike will simply break, and in the worse case it will hurt someone.
EBMX XLB-60 Core — torque where you actually ride
The XLB-60 Core is based on the standard XLB-60 and has been tuned for a sharp throttle response at lower speeds. Around 41 kW peak power, up to 13,000 rpm, and a rotor using EBMX's own IPM design with a 1 mm air gap.
This is not the “weaker” version of the Race — it is a different power delivery. You choose the Core for technical terrain, climbs, stunt riding and riding in town.
Also available in a version for the E-Ride Pro SS.
EBMX XLB-60 Race — when speed is what counts
The XLB-60 Race Edition differs from the standard XLB-60 in two things that change everything: a larger stator (65 mm instead of 60 mm) and a faster winding (105 Kv instead of 95 Kv).
Specification
- Rated and tested power: 35 kW; peak approx. 42 kW
- Max. sustained speed: 13,000 rpm (approx. 14,000 peak)
- Max. torque: 52 Nm
- Voltage range: 48–104 V
- Configuration: 10 poles / 12 slots, Dual Y Parallel winding
- U42H-grade magnets, windings rated to 180 °C
- Max. phase current 900 A, continuous 500 A (28 Nm)
- Air cooling: 13,600 W for 28 min of continuous running
- Water cooling: 26,000 W for 4 min 30 s
- IP67, weight 11.2 kg, 2-year warranty
Those two lines about cooling matter more than they look. They tell you how much the motor will take continuously, not for three seconds on a marketing graph.
The E-Ride Pro version: XLB-60 Race for the E-Ride Pro.
EBMX XUB-80 — for the Ultra Bee V2
The XUB-80 offers 50 kW peak power and up to 12,000 rpm, designed for the Sur-Ron Ultra Bee V2. It is the most powerful unit you can put in an Ultra Bee without rebuilding the whole machine.
You get the full 50 kW when it is paired with the EBMX X9000 V3 controller for the Ultra Bee, which the motor is tuned for from the factory.
An encoder instead of Hall sensors — why this isn't a detail
All EBMX motors use an encoder. It is a difference you feel at the throttle, not just one you read in a table.
Hall sensors estimate rotor position and usually work up to around 2,000 rpm — above that the motor switches to sensorless mode. An encoder measures the real rotor angle across the whole rev range, and does so far more often.
In practice that means three things:
- no sudden current spikes when the wheel spins up, under hard braking or with abrupt throttle inputs — which means fewer protection cut-outs killing power at the worst possible moment
- more precise torque control at low rpm
- predictable, even throttle response
What this means when buying: a motor with an encoder needs a controller that supports an encoder. Torp controllers support Hall sensors — for EBMX motors the right choice is the EBMX X9000 V3. There is more on choosing a controller in our TC500, TC1000 and X9000 comparison.
The harness has to match the model
EBMX motors are sold with a harness and mounting hardware kit matched to a specific bike — the kit designation is given with each product variant. The motor for the Light Bee and the motor for the E-Ride Pro SS are physically the same unit with a different mounting kit.
If you aren't sure which variant fits your model year, message us with a photo of the connector. We'll check before dispatch.
What you need to strengthen along with the motor
- The drive — the standard belt is not a solution at 40–50 Nm. Switching to chain: Warp Drive
- The swingarm — the EBMX swingarm, 60 mm longer, gives more traction and stability with high power
- The chain guide — the EBMX chain guide, a small part that extends the life of the whole drive
- The battery — without a battery with higher current output, none of these motors will show you its numbers
The summary in three sentences
If you want a livelier bike and aren't building the project of a lifetime — the TM25. If you ride technical terrain and want torque from zero — the XLB-60 Core. If top speed and the track are what count — the XLB-60 Race.
The rest of the range: the EBMX collection, the Torp collection and the full catalogue.
