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Everything is easy when you know how and when you've practiced. It can be a hall sensor or it can be a nicked wire, faulty joint or bad connection. It's easy to open the motor, then you can test the hall sensors directlyc to see if one or more are faulty. T might just need cleaning or you might...

https://www.taiwantrade.com/product/power-wheelchair-hub-motor-kit-sa175c2-612255.html Other powered wheelchair kits use front motors and don'tseem to have problems with traction. What about using a heavy motor and mounting the battery on top of or in front of it?

Cyclone do a ready-mades chain drive system that will do what you want. All you'll need is a bracket to mount the motor. It's surprising how many guys come on here asking for advice for their projects that are full of daft constraints. When you have a motor, advantages of things like expensive...

The important dimension, which is the specified rim diameter is the surface where the bead of the tyre sits. It's not easy to measure that unless you make something that reaches over the rim or have some sort of massive calipers. The standard 700C is 622 mm to match what's written on the tyre...

The wiring is absolutely standard and the same as any similar ebike. Santroll controllers work exactly the same as any other make. Every check you've done confirms that things are working as they should. Your problem must be caused by an intermittent connection between the controller and the...

What you're calling the voltage controller is the motor controller. It's not part of the battery. Most rack batteries come in two parts - the actual battery and the receiver for it. The receivers normally, but not always, have a compartment at the front to house the controller and its...

It sounds like the bushes in the forks are worn to me. Are they new or used?

The motor speed is an important characteristic. A low speed one can run with higher current for more of the time than a high speed one. 40 amps is generally OK as long as you only use the high power in the upper half of the speed range. 45 amps sounds a bit high to me. You also need to think...

If it's a 45 amp controller, that 20 amps max on the LCD is probably wrong. Be careful. It might be an idea to check the current independently with a wattmeter. Tell us which motor you have so that we can give sensible advice on current. Tell us voltage too. do you know the no-load speed of the...

Sorry Andy, that's completely wrong. It would mean that everybody with a normal 14A or 15A controller is running more than double what the motor can take. 250W (motor rating) divided by 36V is 6.9 amps. No electric bike has ever run with a controller maximum set that low. You'd struggle on a...

OK, I'll shut up now and let the argumentative tw@ts explain how to sort you out.

Your post #20. You were asking specifically about a Wisper 806SE that has a hub motor. I already explained how the power characteristics of crank motors are different. If you still don't understand, read back through the thread again.

No, if your iphone battery was completely flat and you charged it right back up, it would use less than 1% of your bike's battery.

You can't fit a Badass dongle to an OEM hub-motored bike, like a Wisper because the speed sensor is inside the motor. Also, I'm pretty sure that the speed sensor is only used to show the speed on the LCD. Instead, the controller picks up the speed for the speed limit directly from the motor halls.

Hall sensors will only work if you have Vcc on pin 1 and ground on the middle pin.

Start by disconnecting the motor. Follow its wire from the axle to the connector/s on the cable. See if the motor turns freely when disconnected.

Yes, anything that makes the motor turn will make it generate a small amount of power. The motor has a freewheel, but there's enough friction to turn it slowly when you're travelling without power. Without a battery to absorb it, the voltage generated will light up the throttle LEDs.

It's impossible to say. The power that the motor produces depends on the amps that the controller and battery allow. The motor's speed is fixed by it's windings. each type of motor normally comes in different variants with different windings. Basically, each component of the system needs to...

On the flat, pedalling steadily with a fully-charged battery, about 20 mph.

I've never heard of hall sensors being wrongly wired by a manufacturer. I've seen some that looked wrongly wired before, but when you follow the wires and figure them out, they're correct - always ground in the middle, Vcc on pin 1 and signal on pin 3.