QSMOTOR QS138 90H 4000W 7500W 72V Mid Drive Motor IPM PMSM 100KPH for - E Smart Way

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QSMOTOR QS138 90H 4000W 7500W 72V Mid Drive Motor IPM PMSM 100KPH for Electric Motorcycle ATV

QSMOTOR QS138 90H 4000W 7500W 72V Mid Drive Motor IPM PMSM 100KPH for Electric Motorcycle ATV

$589.00


QSMOTOR QS138 90H 7500W 72V 100KPH IPM PMSM Mid Drive Motor For Offroad Dirtbike Adult Electric Motorcycle

For 138 4000W mid drive motor , it could be used for electric light motorcycle, which could be 72V 100KPH.

What’s more, we provide chain gear adapters as default.

P.S. If you have any confused about the shipping cost, please feel free to contact with us.

Also could place order but don't pay first, then we could adjust the price. 


NOTE:
1.Orders do not include customs duties, which are borne by the buyer.(Except for some aliexpress marked orders including tax).
2.For some special countries with strict customs for import, so pls. confirm it firstly to us that you have ability to do customs clearance, otherwise we will not take on heavy responsibilities for this issue, return money and goods are not support. (special countries list contact seller)

One set including below kits:

Comb 1:

1. 1pc X QS 138 4000W Mid drive motor belt type

Comb 2:

1pc X 138 4000W Mid Dirve motor with 428 14T sprocket adapter

Comb 3:

1pc X QS 138 4000kW Mid drive motor with sprocket design with 428 11T Sprocket

Key Features

1) Light weight and small dimension compare to hub motor

2) High performance benefit from flux weakening

3) High efficiency during climbing, and better acceleration

4) Support regenerative braking


Product Description

11T Sprocket Installation

 
 

Drawing

Test Report

 

Conversion Kits

Refer to the hyperlink.

Application



Max. Speed: 90-100KPH
Motor Type: Permanent Magnet Motor (PMSM)
Efficiency: >92%
Rear Placement: Mid Drive
Waterproof Rating: IP66
Special Features: High performance, regenerative braking


|Qsmotor 138|

**High-Performance Mid Drive Motor**
Step into the future of electric mobility with the QSMOTOR QS138 90H 4000W mid drive motor, designed for peak performance in electric motorcycles and ATVs. With a top speed of 90-100KPH, this motor ensures a thrilling riding experience. The PMSM (Permanent Magnet Motor) technology provides a robust and reliable performance, making it an ideal choice for adventure seekers. The motor's efficiency rating of >92% translates to less energy loss, resulting in extended battery life and reduced emissions.

**Robust Design & Enhanced Functionality**
Built to withstand the rigors of off-road use, the QSMOTOR QS138 is constructed with durable Aluminum materials to ensure longevity and optimal heat dissipation. The IP66 waterproof rating guarantees protection against the elements, allowing for worry-free operation in various weather conditions. The motor's compact size, with dimensions of 34cm length, 34cm height, and 43cm width, makes it an ideal fit for a variety of electric vehicles. Its lightweight design, combined with the power of a 7500W motor, provides an excellent power-to-weight ratio for agile handling and responsive performance.

**Versatile Application & Support**
The QSMOTOR QS138 is not just a motor, it's a solution for your electric vehicle needs. Whether you're looking to customize your electric motorcycle or ATV, the motor comes with a variety of chain gear adapters as standard, ensuring a seamless integration. The motor's robust design is backed by a 105℃ volatile material emission rating, ensuring a safe and reliable operation. With its efficient performance, the QSMOTOR QS138 is an essential component for any electric vehicle enthusiast seeking a thrilling and eco-friendly ride.
The QSMOTOR QS138 90H 4000W 7500W 72V Mid Drive Motor IPM PMSM 100KPH for Electric Motorcycle ATV destined to impress, and priced at only $589.00, for a limited time.

Inventory Last Updated: Jun 07, 2026