QS138 90h 4KW splined shaft (without sprocket) - MightE
QS138 90h 4KW splined shaft (without sprocket) - MightE
QS138 90h 4KW splined shaft (without sprocket) - MightE
QS138 90h 4KW splined shaft (without sprocket)

QS138 90h 4KW splined shaft (without sprocket)

Regular price$506.00
Shipping calculated at checkout.
  • Low stock - 1 item left
  • Inventory on the way



Motor Type:  DC Brushless Permanent Magnet Motor
Motor Design: Mid Drive with Single Axle
Magnet: strong V magnet 90H.
Power: 4000W (maximum 14KW, sometimes can reach 20KW).
Rated Voltage: 72V as default
Rotating: maximum 7000rpm
Maximum Speed 90km/h to 120km/h.
Maximum Torque: 60N.m to 80N.m.
Maxim Efficiency: 91%
Waterproof Grade: IP54
Weight 13kgs
Package Dimension: 33x33x32cm.

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QS138 90h 4KW splined shaft (without sprocket) - MightE


Unleash the power of your e-bike with the QS138 90h 4KW motor. Its robust construction and splined shaft design ensures efficient power transfer for a robust and seamless riding experience.

QS138 90h 4KW splined shaft (without sprocket) - MightE

Impressive Power

With a high 4KW power output, this motor boosts your e-bike's performance, taking your ride to new heights.

Efficient Power Transfer

Its splined shaft design ensures maximum power delivery, transforming your biking experience.

QS138 90h 4KW splined shaft (without sprocket) - MightE
QS138 90h 4KW splined shaft (without sprocket) - MightE

Robust Construction

Engineered to withstand the rigors of any riding condition, offering both reliability and longevity.

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.