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Look at the LEDs on your throttle. If they go off or right down when the motor cuts, it's the battery. If they hold steady, it's a connection problem or badly adjusted pedal sensor. Are you using the pedal sensor, throttle or both? Does it cut out with both?

You're making us ask you questions instead of giving you answers. Instead of giving us made up words, can you describe what you think a trutter or trotter is or show us a photo?

At 62kg, I'd expect at least 60 miles. Does the battery show 17.5 Ah on the label?

Most brakes are self-bleeding. Just position it so the air goes uphill into the resevoir and pump the lever a few times. When the lever goes firm, you can add a bit more oil into the reservoir so that the air can't get into the pipe when you turn the bike upside down, but don't over-fill because...

What's a trooter?

It's always best to test to see what's not working before pulling things apart or replacing parts. Tests show you where to look for the problem. With everything switched on and connected, check that you have 5V between red and black hall whites, then test that each hall wire pulses 5v when you...

Test 2 shows a fault. With the LED panel switched on, it should have shown 41.5v. Without that voltage, all the other tests will show zero because it's the pink wire that provides power to the controller, which in turn powers them with 5v. Did the Control panel light up when you switched it on...

That's incorrect. It's the rated power that must be 250w or lower, not the motor's actual power. If your motor is labelled 250w, it's legal. You can then use a 48v battery and a 25 amp controller for 1000w input power (around 700w output) if you want and still be legal. If it's labelled 350w...

Do you have an LaeD or LCD control panel? If so, does it switch off when the motor cuts so that you have to switch it on again. If so, your battery or its connection is knackered. If not, you have a connection problem somewhere else or your brake switches are playing up.

If you're talking about the thickness of the sprockets, it's no problem if you use a BMX chain. They should both have the same pitch as long as you don't have some weird freewheel on the back, otherwise change the freewheel for a standard one. What chain did you try? Derailleur chains are...

Stop watching Youtube videos and then wasting your time doing pointless tests. Set your meter to 200v DC, which is when the pointer is in the 11 o'clock position. Disconnect all wires from the controller except the battery wires and the power wires that go to the control panel (red pink black...

There's no such thing as legal wattage. There's no regulation on it other than your bike mustn't burn out. You might as well set it to maximum and use the normal levels on the LCD to regulate the power.

If you've still got all the bits, you can glue them back together with the UV glue that you can buy on Ebay. It's incredibly strong. You need the UV light as well as the glue. You can get it all in a kit.

That's not very likely. The BMS will switch off when the first cell reaches 2.9v. I can't see any problem with that reapair other than the reduction to 15Ah on a good day. It's probably a good idea not to run the battery low because that cell will go lower than normal. It's normally the...

There is no P6. Where did you get that from?

You can use any frame-mounted battery you want. Generally, if you buy from a proper retailer, like Eclipse Bikes, you get decent quality and support. I always buy from China (EBay, Aliexpress, BMSBattery, PSWPower, Topbike kit, Elifebike, etc) and I've never been disappointed. Make sure it has...

Is the controller integrated or separate? Which type of bottle battery is it? How much space do you have? A photo of your bike might help.

Not so easy on the disc side.

My Peugeot Partner has a rear view camera instead of a mirror. It's not very good at night, nor when it rains. I don't believe these things would work on a bike because the sunlight makes it difficult to see the screen. Even with my fantastic amoled screen on my Samsung phone, I have stand in...

Motors are very reliable. When your bike doesn't work, you need to find the fault, not change the motor. The fault is nearly always in the control system or the battery, not the motor. To find the fault, all you need is a multi-meter...