Rear hub motor help

Azza997

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Dec 31, 2023
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Essex
Hi all, I got a bike with a DIY ebike kit on it, was originally on a 26" mtb now on 27.5" mtb, theres no brand name on the hub motor only some letters and numbers ZC620080833 and I cannot find anything based off this, anyone able to help me figure out what power rating this motor is? Currently it's got a 48v 13ah battery and a 26a controller with sw900 screen, does about 28mph on a flat and had 43mph max downhill when it was on the 26" (could have gone faster i just didnt have any brakes at the time) and on the screen reads just over 1200w on full throttle but battery dies really quick, when fully charged volt meter on throttle reads 54.4. I was looking at getting a higher voltage and amp hour battery and a higher amp controller but not sure what the motor can take, any help is appreciated, thanks.
 
Consider posting picture of your hub motor. In the picture below is a 1Kw motor. However, if the manufacturer wanted to, they could have put a less powerful motor IN the hub. So Hub size is not an absolute indicator. The motor in my picture is likely a Bafang, but it lacks their branding.

Keep in mind most hub motors can be over-driven for brief periods of time. The best way to measure stress is how warm the motor gets.
A hot motor is not a happy motor.

A critical examination of the drop-outs on your frame/fork should also be done. Some frames/drop-outs won't safely support a larger motor.

The brake rotor next to the hub is 160mm (roughly 6.3 inches) which provides scale for the image.
Hub motor model.jpg
 
Consider posting picture of your hub motor. In the picture below is a 1Kw motor. However, if the manufacturer wanted to, they could have put a less powerful motor IN the hub. So Hub size is not an absolute indicator. The motor in my picture is likely a Bafang, but it lacks their branding.

Keep in mind most hub motors can be over-driven for brief periods of time. The best way to measure stress is how warm the motor gets.
A hot motor is not a happy motor.

A critical examination of the drop-outs on your frame/fork should also be done. Some frames/drop-outs won't safely support a larger motor.

The brake rotor next to the hub is 160mm (roughly 6.3 inches) which provides scale for the image.
View attachment 12865
Thankyou here's a picture (bit dirty crashed it last night) also 160mm rotor and on a 27.5 inch wheel for scale. I've never noticed the motor get hot even when full throttle for half hour I did originally have a wire melt in the bag holding the controller but was for the throttle and has been fine since changed the throttle. Where I came off I have cut some of the wire going into the hub motor so going to be taking it apart to sort that wire out, would it say inside what it is or would it be able to be worked out from inside like coming how many wraps of wire and how thick ect? Cheers
 

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