Kunray Brushless BLDC Motor & Controller Kit 1000W–3000W (36V–72V) with Removable Heat Sink for E-Scooter, E-Bike & Go-Kart
48V2000W / China Mainland
$440.68
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Kunray Brushless BLDC Motor & Controller Kit 1000W–3000W (36V–72V) with Removable Heat Sink for E-Scooter, E-Bike & Go-Kart
$440.68
Supercharge your custom EV build, electric scooter, e-bike, mini bike, or go-kart with the Kunray High-Speed Brushless DC (BLDC) Motor & Intelligent Controller Powertrain Kit. Engineered for demanding performance, this brushless system delivers rapid acceleration, brutal climbing torque (up to 6.9 N·m), and sustained high-RPM power across 36V, 48V, 60V, and 72V platforms ranging from 1000W up to 3000W.
Upgraded with a precision-machined removable extruded aluminum heat sink sleeve and 140 dual-sided ventilation openings, this motor runs significantly cooler under continuous heavy loads—preventing thermal throttling and extending stator lifespan. Whether you need a standalone motor replacement or a complete ready-to-run powertrain conversion package with matching speed controllers, throttles, and T8F drive components, Kunray provides professional-grade EV propulsion.
🚚 Transparent Pricing: All variant prices include a dedicated $100 USD express freight allowance to ensure safe, traceable, door-to-door delivery of heavy-gauge motors and powertrain components worldwide.
Key Highlights & Engineering Advantages
- High-Power Brushless Motor (1000W–3000W): Pure copper stator windings and high-grade neodymium rotor magnets deliver industry-leading energy efficiency (>83%) and minimal electrical resistance.
- Removable Aluminum Heat Sink: Upgraded finned aluminum cooling jacket clips directly onto the motor casing, dissipating heat rapidly to maintain peak torque during aggressive rides.
- Dual-Sided 140-Vent Airflow: Front and rear end-plates feature 140 precision-drilled ventilation ports for continuous internal airflow.
- Wide Voltage Compatibility (36V–72V): Tailored voltage and wattage configurations supporting 36V, 48V, 60V, and 72V battery systems.
- Industrial 24-MOSFET BLDC Controller: 45A heavy-duty intelligent controller features 3-speed switching (Low/Mid/High), reverse drive, electronic cruise control, regenerative braking, hall sensor monitoring, and anti-theft alarm power.
- Heavy-Duty T8F Drive System: Fitted with an 11-tooth T8F drive sprocket engineered for heavy-duty mini-bike and go-kart chains.
- Multiple Control Options: Available with ergonomic twist throttles (featuring digital LED voltmeters and ignition key locks) or heavy-duty floor-mounted foot pedal accelerators.
Motor Output & Performance Matrix
| Configuration | Rated Voltage | Rated Current | Rated Torque | Rotating Speed (RPM) |
|---|---|---|---|---|
| 36V 1000W | 36V DC | 27.7 A | 5.7 N·m | 3,750 RPM |
| 48V 1000W | 48V DC | 20.8 A | 5.1 N·m | 4,650 RPM |
| 48V 1500W | 48V DC | 30.0 A | 5.1 N·m | 4,100 RPM |
| 48V 1600W | 48V DC | 34.0 A | 5.1 N·m | 4,350 RPM |
| 48V 2000W | 48V DC | 42.0 A | 6.9 N·m | 5,650 RPM |
| 60V 2000W | 60V DC | 35.0 A | 5.1 N·m | 5,400 RPM |
| 60V 2500W | 60V DC | 45.0 A | 5.6 N·m | 5,800 RPM |
| 72V 3000W | 72V DC | 45.0 A | 5.4 N·m | 6,700 RPM |
Brushless Speed Controller Options & Wiring
Kunray high-efficiency brushless controllers come pre-wired with labeled connectors for hassle-free wiring:
- Phase Wires (Yellow, Green, Blue): Ring terminal eyelets for direct, high-current connection to motor phase lugs.
- Hall Sensor Plug: 5-wire / 6-pin white connector for real-time motor rotor angle synchronization.
- Power & Ignition: Thick Red (Battery +), Thick Black (Battery -), and Orange/Red E-lock ignition switch wire.
- Speed Control (Throttle): 3-wire throttle plug (5V, Signal, GND) compatible with twist grips, thumb throttles, or pedal pots.
- 3-Speed Switch: Selectable Low (80%), Mid (100%), and High (110%) performance curves.
- Reversing Circuit: Instant forward/reverse toggle for electric karts, trikes, and mobility chassis.
- Brake Inputs: Low-level and high-level electronic brake cutoffs for instant motor disengagement.
Variant Guide: Motor Only vs. Complete Conversion Kit
| Component | Motor Only Option | Complete Kit Option |
|---|---|---|
| BLDC Motor | ✔ Included (with T8F 11T Sprocket) | ✔ Included (with T8F 11T Sprocket) |
| Aluminum Heat Sink | ✔ Included (Removable Clip-on) | ✔ Included (Removable Clip-on) |
| Brushless Controller | ✘ Sold Separately | ✔ Matched Heavy-Duty Controller |
| Throttle & Controls | ✘ Sold Separately | ✔ LCD Keyed Twist Throttle / Foot Pedal |
| Drive Chain & Sprocket | ✘ Sold Separately | ✔ T8F Chain & Driven Sprocket Plate |
| Switches & Brakes | ✘ Sold Separately | ✔ 3-Speed Switch, Reverse & Brake Levers |
Frequently Asked Questions (FAQ)
Q: What vehicles and DIY builds can this motor kit be installed on?
A: The Kunray KRMY1020/KRMY1029 series is an extremely versatile mid-drive/external-mount BLDC motor. It is popular for custom electric go-karts, stand-up electric scooters, dirt bikes, ATVs, electric golf carts, mini choppers, and custom electric trikes.
Q: Why is the removable aluminum heat sink important?
A: High-power brushless motors draw up to 45A during prolonged hill climbs and high-speed runs. The finned aluminum heat sink dramatically increases surface area, drawing heat away from internal windings to prevent thermal degradation and power fade.
Q: What drive chain does the motor sprocket fit?
A: The motor comes fitted with an 11-tooth T8F drive sprocket designed for standard T8F chain. (A 25H sprocket can also be fitted if required for smaller scooters).
Q: Can the motor run in reverse?
A: Yes. All complete kits include a 3-speed / reverse switch that activates the controller's dedicated electronic reverse circuit, ideal for go-karts and utility vehicles.
Q: What battery should I use?
A: Always match your battery nominal voltage to the motor and controller configuration (e.g., a 48V kit requires a 48V nominal lithium or lead-acid pack, a 72V kit requires a 72V pack). We recommend a high-drain battery capable of delivering continuous 40A–50A discharge.
Q: What warranty and customer service does E Smart Way provide?
A: E Smart Way backs all powertrain components with a comprehensive 1-year manufacturer defect warranty, pre-shipment bench testing, and responsive technical support.
Shipping & Delivery Information
Express Tracked Shipping: Heavy-gauge motors and powertrain conversion kits are carefully packaged with shock-absorbing foam and dispatched with full door-to-door tracking. All listed variant prices include a dedicated $100 USD express freight allowance.
Customs & Import Duties: Depending on destination regulations, international shipments may occasionally be subject to local VAT, customs clearance fees, or import duties charged by local authorities. These fees remain the customer's responsibility.
Accurate Delivery Details: Please verify your phone number and delivery address at checkout to ensure swift customs clearance and courier coordination.
