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[SOLD] [Europe Switzerland] QS 273 50H V4 8000W Hub Motor 17*3.5"

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Joined
Jul 25, 2025
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143
Location
Switzerland
I've originally ordered and received a QS 273 8000W Hub Motor for an electric motorcycle conversion, but I'm not going to use it because of legal issues (can't do any frame work in Switzerland without excessive costs if you want to get it street legal again). So I ordered a QS 138 mid drive instead that I'm going to use, and I'm looking to sell the QS 273 hub.

It has never been mounted in a bike and was only set up in a test environment, to confirm that the other parts (battery, motor controller, inputs) work.

I paid $486 without tax and import costs. Trying to recoup as much of the costs, of course, so aiming for something like $400.

 
Do you know the electrical parameters of the hub motor, such as its Ke, Ki, Kp, and Ls in µH?

I have an identical one, and although mine is a V2, I think that information would be very useful for fine-tuning its configuration on a Sevcon Gen4.
 
I got this from Alan:
QS273 hub motor: Back-EMF at 1000 rpm: 54.15 Vrms; phase inductance: 0.1026 mH
 
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