Please do your research before purchasing. This is a very complex motor system and should only be purchased by those who know exactly what they are doing and/ or are willing to figure it out :) 

This kit is rated at 3kw but can handle much more at peak. Be prepared to do a lot of custom wiring and splicing etc. Not for the novice!!!! Lets save us both a lot of time and energy :)

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• Item: QS Motor 3000W 138 70H Mid Drive Motor

• Motor Type: BLDC Permanent Magnet Inner Rotor Motor With Hall Sensor

• Brand: QS Motor, QSMOTOR

• Motor Design: Single axle 

• Matched Wheel: 12inch Wheel (as default)

• Magnet Height: 70mm, 40pcs, 5 pole pairs

• Diameter of stator: 138mm

• Rated Power: 3000W

• Rated Voltage: 72V as default

• Speed: 100KPH 

• No-load rpm: 3800rpm without flux weakening, 6000RPM with flux weakening.

• Max Torque: approx 56N.m without Reduction ratio, approx 247N.m with 1:4.77 Reduction ratio  

• Reduction ratio: 1:4.77 (as default)

• Max Efficiency: 88%

• Continuous Battery Current: pending (72V)

• Peak Battery Current: 120A (72V)

• Suggest Peak Phase Current: 450A

• Thermic Probe: None as default (KTY83/122 is available, if you need, please let sales man know).

• Working Temperature: Pending

• Single Hall Plate with waterproof connectors

• 16mm² Cross Section of Phase Wire (not include insulation layer)

• Hall Sensor Phasing angle: 120 degree

• Waterproof Grade: IP54

• Color: Black 

• N.W./G.W.: 10.8kgs/11.5kgs   

• Package Dimension: 34cm*34cm*33cm

• Axle design to match with 428 sprocket, we will provide 428 14T sprocket as default.

• includes 

• 1pcs X Votol EM150SP sine wave motor controller with standard CAN-BUS

• motor

• throttle

• Wiring harness