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Thanks for that, as soon as my wife and son stop consuming ALL available bandwidth I will ask the sellers. I might ask him if he would like to swap it for a 40 y.o. housewife, or a small ginger boy.

All controllers are smart. Their job (among other things) is to control the amount of currrent that the motor receives. Most 250w/36v bikes operate at a maximum of 15 amps. The battery will have a maximum continuous current that it can supply. It doesn't matter what controller you have, if you...

If anyone finds a steel one please post here as I've been looking for one and not found one so far.

Take it apart, solder a flying lead USB socket (or something else) to the existing USB socket?

I ordered 3 controllers, they were all the same. They only have one three wire connector, and one two wire connector.

Pretty sure it was wired wrong, as I tested it on the bench.

I just came to install a couple of these, all delivered from BMSBattery yesterday. The sensors and the controller are wired slightly differently, and won't simply plug n play. If you just plug them in the light on the HWBS will be always on. The solution is to swap the position of the Yellow...

Best bet if you are not condident.

Yup, sounds like a problem with battery. Can you take it apart? Might be simply fault.

I have installed/used about 20 throttles. Only one has ever broken, and that came with my first kit, second hand, 3 years ago. The remaining 19 (or so) have come from BMSbattery.

IIRC those are 36v brushed DC motors. If you are supplying it with 38v and it does not turn, it's the motor (or wiring to it). Does it have two wires going in?

...make sure the leads are in the correct holes (V, not A!) Or you'll have a nice big flash and some smoke.

Neither would a modern car. It's still either a Diesel or Petrol car. The electronic element of either vehicle is simply there to control the delivery of power.

I don't normally post here, but today I think I'm allowed to. For various reasons, my off roader has been, well, off the road. I finally found a spare hour or two to fix her up. I made a few mods while I was about it, and gained enough confidence to ride her up to Woodbury Common. (East Devon)...

+1. Take it apart, add plenty of grease, put it back together. It'll probably be fine after that.

Oh, I see.

How about soldering the shunt? Is it possible/easy on these controllers?

There are two easy things you can do: 1. Remove the restriction. This will allow the motor to assist to a higher speed, and then as you go faster the assistance will tail off. 2. Modify the controller so it gives a bit more current. Thus will give you more current, thus more power. So you'll...

Yes and no. If all you want is a little assistance, say for climbing hills on the road, then nearly any modern mountain bike of reasonable quality will suffice. V-brakes as a minimum. If you want to go beyond 250w, then you need to start thinking about disk brakes. But all depends on the...

Ouch! My eyes!!!