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That controller should work OK. Get the 500w one because they don't specify the current, and 500w controllers are normally around 20 amps, which is what you need. If you like the bike, it's pretty easy to upgrade to a lithium battery, but you need one that can continuously give what the...

Test the motor by connecting a 12v battery directly to the two motor wires. If it works OK, chuck all the electrics and get any other standard Chinese brushed motor controller that can give 20 amps. You'll need a new throttle to go with the controller and you'll be very lucky to find a...

I don't read anything from the BBC, but just looking at that title I can see two things. Vaccine complications, which are actual cases of people getting injured and dying from the vaccine, and corona virus "risks". Risks are theoretical , not actual. There's a risk that an asteroid could hit the...

When buying a bike with a mid-motor, you really need to stick with Bosch, Shimano and Bafang. Yamaha is probably worth risking if other factors are good. The problem with other systems is who's going to fix them when the warranty runs out. The Batribike uses Promovec electrics that most people...

I'm now thinking that I was probably wrong when I assumed that OP was pedalling up the hill while using the throttle.

The reports are filed by doctors who treat the people with the ailments, not just random people on the internet. I can imagine that a lot of busy doctors would forget or not get round to filing reports. I would bet anyone that more doctors "forget" to file the reports than misdiagnose the...

It would be very unusual for the 5v not to switch on when you have battery voltage on the blue wire because the blue wire goes more or less straight to the 5v regulator that gives out the 5v. When the 5v regulator is blown, it normally gives out something, not zero volts, so the first thing I'd...

Good point. It could be that the shop set it up incorrectly with a 4mph throttle. Anyway, Wisper will tell her how to reset it the way she wants it.

It doesn't. The controller can work independently from the LCD, otherwise I wouldn't have told you to do that. With the red and blue bridged, you should be able to measure battery voltage on both wires when switched on. Did you check that?You need to be sure about what's wrong before buying...

I'd prefer a hub-motor for that. Any of the middle-sized ones running at 48v will blitz it. Woosh do a 48v hub-motor kit at £599 including the battery.

Can you show what you ordered? i recommend one like this, which is hardened steel. Many on Ebay are stamped out of non-hardened steel. They're easy to fit. Put it on the left side and fix the tie-bar to the lower caliper adapter screw. Use washers to fill the gap when it sits above the surface...

Look on Youtube.

If the setting for maximum speed in the LCD doesn't work, then it's fixed in the software and is unchangeable. Make sure that P3 is set to 1, which will allow the maximum speed in all the 5 levels (1 to 5, not 0). If it's set to 0, you get a different speed limit in each level with maximum only...

The meter on your 24v bike says that the battery is fully charged. If your're charging with the bike and meter switched on, the charger probaly won't switch to green because it will still be supplying power . Try switching the bike and the meter off.

The people advising you don't have a clue what they're talking about. There's absolutely no problem with drilling the frame. How do you think all the other bikes get their bottle fixings in? They don't go in by osmosis last time I tried, so the manufacturers have to drill holes to install the...

The display is a voltmeter to show battery voltage and the key is just a switch. Normally, you'd wire in the wire that powers the controller (ignition wire) so that the switch switches on the cotroller and the display. If you already have those functions, they're not needed on the throttle.

If you don't get enough power when you use the throttle, something is wrong, and it's not likely to be the torque sensor. You should ring Wisper customer service and ask what they can do about your bike's lack of power. Something is clearly wrong. It has a 44v battery, so should give you approx...

Show photos of both your drop-outs from the side.

You have one or six magnets in your motor's speed sensor arrangement. It should be obvious which one you have from the speed readout. It will be correct, 1/6 the correct speed or 6 times the correct speed depending on whether you set 1 or 6 and whether you have one or six magnets. Tell them not...

I've never set P1 on any bike that I've fitted a KT controller to, and I've fitted a lot. You shouldn't need to adjust it unless you have some weird motor. It is necessary on sensorless motors.