Works right away on my V8. I couldn't have done better.
Ouxi V8 Limited Controller 21A (Red Motor Plug)




Ordered before 23:59, delivered tomorrow
Motor plug colour: Red
- Easy to install
- Home delivery across the EU
- Not happy? Money back, 14-day cooling-off period
- Fits: V8
Step by step How do I check my motor plug colour?
How to check which motor plug colour your fatbike has
All you need is a pair of wire cutters and it takes a minute. The colour is on the inside of the motor plug, so you'll need to pull it apart. That's fine: it won't damage the plug.
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Go to the rear wheel
Put your fatbike on its stand. The motor is in the rear wheel, and one thick cable comes out of it: the motor cable.
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Follow the motor cable to the plug
The motor cable runs along the frame to the first plug. It's usually held in place with two cable ties. Cut the first one.
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Cut the second cable tie too
Now the plug hangs free and you can get a good grip on it.
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Hold the plug on both sides
Hold it by the thick plug housings, not by the thin wires.
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Pull the plug firmly apart
It's a tight fit, so don't be afraid to pull hard. The plug won't break.
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Look at the inside
Where the pins stick out you'll see the colour: red or black. That's your motor plug colour.
This controller only fits if the inside of your fatbike's motor plug is this colour. Not sure? You can check it in 1 minute.
Frequently bought together

Customer Reviews
Another happy fatbiker here
Clear description, so I ordered the right one. There was no mounting hardware included.
The cables were neatly labelled. I was on the road again in no time.
It pulls away nicely again . Nice shop to order from. Hats off.
Handy that it says which plug it is. I would have liked a bit more explanation with it. Fine experience.
For the V8 this was the Right one.
The motor runs smoothly again. The service was friendly. Just good work.
Been in there for a while now. Nothing else to fault.
Same type as the one that was in there. My question was answered quickly.
Just good, no fuss. Quick delivery. Big thumbs up.
Sent an email and then ordered the right one.
Good replacement for the original controller. Neat handling. Definitely satisfied.
Product information
The benefits at a glance
- Restricted to 25 km/h
- 6 km/h throttle
- Original part
- Suitable for: Ouxi V8 with red motor cable
- Version: 21A, 250/500W, red motor plug, five connection cables with alarm
- Speed: limited to 25 km/h, throttle 6 km/h as walk assist
A limited replacement controller for the Ouxi V8 with red motor plug. If your V8 no longer delivers power or the assistance drops out, the controller is often the cause; with this part the bike rides like it did from the factory again, at 25 km/h.
This model does not tune; if you want that, look at the tunable V8/C80 controller. A V8 with black motor plug needs the black limited version, the plugs do not fit each other. Fitting: remove the saddle, unclip the old controller, put the five plugs on the new one.
The controller is the brain of your fatbike and drives the motor. Before you start, take a photo of how the connectors are positioned, so you can reconnect the new controller in exactly the same way. With this version, pay attention to the red main connector so it fits your existing wiring. Can't manage it yourself or in doubt? Feel free to message us on WhatsApp at +31 6 82090642, and we'll help you out quickly.
Pro tip: place the old and new controller side by side and connect the connectors one by one, so you avoid mistakes.
WhatsApp chat only. We can't take calls, not even via WhatsApp.
This controller fits the Ouxi V8 with a red connector. Before you order, check that the connector type and the connections match your own part, to avoid disappointment. In doubt? Just message us on WhatsApp at +31 6 82090642.
WhatsApp chat only. We can't take calls, not even via WhatsApp.
Difference between restricted and tunable: it is in the software, not in the number of amps.





