QS138 4000W V3 Mid Drive Motor With Gearbox
QS138 4000W V3 Mid Drive Motor With Gearbox
QS138 4000W V3 Mid Drive Motor With Gearbox

QS138 4000W V3 Mid Drive Motor With Gearbox

Regular price£475.00
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  • Inventory on the way
QS138 4000W V3 Mid Drive Motor With Gearbox



  • Light weight and small dimension compare to hub motor 
  • High performance benefit from flux weakening
  • High efficiency during climbing, and better acceleration  
  • Support regenerative braking


Product details:

  • Motor Type: BLDC Inner rotor motor
  • Brand: QS Motor
  • Magnet Height: 90mm 5 pole pairs
  • Rated Power: 7500W
  • Speed: 4000RPM
  • Max Torque: 72 N.m
  • Cooling Method: Air cooling 
  • Working Temperature:70-120°C  Peak 150°C
  • Phase Wire: 20mm²
  • Colour: Black
  • Net Weight: 13kg
  • Package Dimensions: 34cm*34cm*34cm


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  • Free worldwide shipping

Elevate your biking experience with the QS138 4000w V3 motor

Engineered with a splined shaft for efficient power transfer, this motor delivers consistent, robust performance for a smoother ride.

Don't take our word for it


My son is 5 years old and racing in MightE. We switched over due to the noise from an iame engine, which he wasn't keen on, and have not regretted the decision in the slightest. Jonny at MightE, current UK distributor Dave and Rob have been extremely helpful in support and improvement within MightE




My son is in his third year of karting with MightE and has won three championships. Had we raced petrol karts I would not have been able to navigate the minefield and cost of the engines and he would not have been able to show his ability. MightE has provided us with a level playing field, with motors that are proven to be equal and which are simple for a non-mechanic like myself to manage.




I purchased my Talaria from Mighte in April and love it so far! I had a few issues with my throttle not always working correctly, but customer service has been very responsive and helped me work through the issues.




We started go karting last October with the choice of IAME & MightE.
We went down the MightE route and have never looked back.
We like the fact they're simple to use and maintain and fair across the board. The grid this season is friendly and good bunch with everyone always helping if you need any assistance. It is a perfect entry stepping stone to go karting and we look forward to hearing more about the electric cadet.



Disclaimer: Please be advised that the images displayed on our website are for illustration purposes only and may vary from the actual product you receive. While we make every effort to provide accurate and up-to-date images, variations in colour, size, design, or other visual aspects may occur due to manufacturing changes or other factors. If you have any specific questions or require further clarification, please do not hesitate to contact our customer service team before placing your order.