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Torque sensors give very little advantage if any. In fact some would argue that overall they have disadvantages. Cadence sensors got bad rep from the early days when there were big delays in the power kicking in and long run-ons after stopping pedalling. Decent modern controllers don't do...

The logical extension to that is that the government orders you not to come out of your house nor allow anyone else in so that you can't catch a disease or have an accident. That's after banning the use of ladders, of course

When the LCD flashes on like that, it means that the battery is switched off - normally because of a fault in the battery. First, measure the actual battery voltage at its terminals with a meter.

Show a photo.

If you pedal too fast, you get no power. You have to pedal at 60 rpm with the standard 36v version. There is no power after 75 rpm, so if you pedal at that speed, you get nothing. How fast do you pedal?

Which brakes - type and size?

The propblem with Schwalbe Marathon tyres is that you can stretch the wire in the bead if you use too much force levering them over the rim instead of using the correct technique making sure that as much of the tyre is in the well of the rim before attempting to lever them. If you do it right...

What is it that you want to know? What is the problem that you have? How did it start?

Lower than 40 is bad. 60 rpm is ideal. 75 rpm is max. The 48v version has a lower KV than the 36v one. You can use the 36v one at 48v with a 48v controller or the open source firmware, but it will spin the cranks 33% faster, so those figures above become 50 rpm, 80 rpm and 100 rpm, which some...

Etropolis have a full range of bikes from the cheapest Chinese folding bikes to top of the range full suspension bikes with Bosch motors.

It's possible that you didn't fit the speed sensor correctly. Check it to make sure that the gap is right. The 36v battery should give you more than enough assistance. You're not too heavy for it. Don't let the pedal speed drop too low. Use a lower gear to pedal faster.

The thing on the spoke is a magnet for the speed sensor. That could be the cause of your problem. https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313&_nkw=spoke+magnet&_sacat=0

Ask on Endless-sphere, wher they use a lot of those sort of things. All you need to switch on an LCD is power to the black and red wires, but it can't do anything unless you have the right controller with it.

It's a standard part. You can buy them from Aliexpress. I've only seen them with the controller, but the price for both is the same as most LCDs on their own. https://www.aliexpress.com/item/33041580143.html

You can't run two motors from one controller because the pulses have to be exactly timed to the position of the motor. You can run two controllers from one throttle. You would have trouble with traction from a single 250w front motor because of the high torque from the small wheel. What you...

They were on legal for hire scooters, so not relevant. They were done for drunk driving, not riding illegal vehicles.

Not much chance of that either, and even if you could, who's going to insure it? It would be much cheaper, easier and safer to buy a ready made and registered electric scooter, if that's what you want.

Nice dream, but you have very little chance of realising it. Let's look at two motors first. A rear 500w one in a 12" rim would wheelie a short wheelbase bike like that, so a front one would get zero useful power on the road. A 500w front motor on its own in a 26" wheel stuggles for grip...

The sensor on the left is handed, though it can work in reverse if you invert the sensor. The sensor on the right isn't handed. It can work on either side if you install the correct magnet disc the right way up. If you're using the magnet disc that came with it, and it doesn't work, you have...

As always, you guys show everything except what's important. In this case it was your feet. In the couple of glimpses I got, it appeared that there were 2 clicks 180 deg apart in the same rotational position of the pedals each time. Is that correct?