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You need the LCD that goes with it, which will double the price...

I didn't look at mine when it was switched on. Its probably infra red light anyway. The two pairs are necessary to get the direction of pedalling, otherwise it would set the motor off when you lifted the pedal to get started. The instantness could be due to one or both being blocked...

The video doesn't work. Why don't you put it on Youtube?

For a middle-sized motor, the Q128 seems to be more reliable than the Bafang SWX02, but the larger Bafang motors (BPM and CST) are pretty good. Obviously, the bigger the motor, the more power they can handle. The Q128 punches above its weight because it has a higher reduction ratio.

No need for a battery connector. Cut them off and solder the wires, which is quicker, cheaper and more reliable.

Don't skimp on the battery. That controller pulls 30 amps, so you need a battery rated at around 40 amps, which means a big high capacity one or one with high discharge rate cells, like Samsung 30Q. Those motors are only efficient when you get them up to speed and they'll draw maximum current...

There's no way in the world that 2S 18650s are going to give 39 amps for an ebike. Even if they could, the capacity would go down to from 5Ah to around 3.5Ah, which is going to last less than 6 minutes. That'll give a range of about 3 miles.

The torque sensor is the plastic bit that's attached to the back of the chainwheel. When you take it off you can see little pillars with slots in them where the sensors are. They're more like thin slits. You have to clean them. One side is an LED, and the other side a light sensor. A slotted...

You don't need to upgrade that motor. It can do a lot more than what it's being asked to do in that bike. It's the battery and controller that are the limiting factors.

It's a sensored motor, so you need a controller for sensored motors, which is most of them.

Too much to read. I don't have that level of concentration anymore, nor the time. I got as far as David Hou. Send him my regards. From the title, I'd guess that you don't understand how the levels on your controller relate to speed control.

Surely, if you had parked your bike the other way round, it would make their bike harder to get out, which is what put them in a bad mood.

The 17 amp 36v gives a bit more power as long as you have a decent battery. The 15A one is a the same power as what your Brainpower one gives.

BMSbattery have been trading for ages. I think I first used them in 2011. They're fine as a supplier. Just buy the motor from whoever is the cheapest, and make sure that you get the right speed. That Planet X bike looks OK. Basically, you can get your speed with a lower power, lightweight...

It's more the weight than anything. the plastic gears inside the BPM are much bigger and stronger than the other motors. It's a motor designed for high torque. The XF07 can't hold a light to it. The SWX02 is half-way between the two, but many of them are around 270RPM. For a 26" wheel, you'd...

I've used lipos extensively. I can summarise by saying that it's a lot of messing about and more expensive than you calculate. You have to allow for their shorter life and the chance of bricking them, which is much higher than you think. Don't forget that you have to make a case to put them in...

Any controller will work, but I always think that it's worth spending the £60 on a KT controller and LCD because it has a much better control system and we know all the settings, plus there are many power options 14A, 15A, 17A and 20A that's also adjustable in the settings.

It can be awkward to get a bike out if the bars from another overlap it, which is I guess why the guy complained. Suggest that the other guy puts his bike in facing out, so that when you put yours facing in, he won't be hindered. Instead, you'll be slightly hindered putting your in. Second...

You ride with your hands on the hoods, where you can reach the brakes and shifters with your fingers. You can get cable brakes with extensions that come along the bars. I have some, but they're terrible. I think a gravel bike with a 48v 328 rpm Q128C rear motor and a 52V battery would give...

For a bike like that, you need a robust motor like a Bafang BPM. You can find them stamped 250W, but you have to hunt around now.