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Between the rain showers, I managed a bit more investigation. The LED display doesn't show the error when I power it off the bike on its own using a lab power supply. When it's connected to just the controller and battery it does have the error. Logic therefore says that the problem is with the...

You didn't answer the questions!

Another happy ending. Sigh!

The standard for Europe is EN 15194, the same as UK.

I wouldn't trust Trustpilot reviews for ebike kits. Most people haven't a clue about this stuff, so they fit it incorrectly and get problems, then blame the supplier. You need really thick skin to be an ebike kit supplier. For riding on the road, like shopping, touring, visiting and commuting...

The power is not limited by law to 250w. there is no limit to how much power you use, nor how much your motor can give. The law is that the motor must be rated at no more than 250w. Using a different battery doesn't change the motor's rating in any way. 36v motors generally run OK at 48v. The...

Yes, of course. They try every trick to do things that they're not entitled to. They say, "Stop a moment...." or "Wait there". If you ask if you're detained, they never answer, because if you are detained and they haven't the grounds, you can sue them. If you're not detained, you can just carry...

Answered in post #20.

Screw-in BBs are locked when installed. PF ones will rotate due to the reaction torque of a motor. You therefore need a separate arrangement to hold the motor stationary when using PF BB. That's easy to achieve on some bikes using spotlight bracket and torque arm like in this photo: The...

It should work OK with a preset. I've used potentiometers on a few different contollers as cruise control devices, and they all worked. Maybe 4.4v is a bit high. 3.8v would be more like a normal max throttle signal, or maybe your preset was faulty.

They can't search you unless they have reasonable suspicion that you have committed or are about to commit a crime. There's quite a high threshold for that. They can't just say you look suspicious or it's suspicious that you're there. Likewise, refusal to answer their questions cannot be used as...

An EAPC is a bicycle. The police have the right to stop and check it whenever and wherever they want unless it's on your own property.

The police can only ask people for details if they suspect they've committed an offence, except if they're driving a motor vehicle. They can stop and check any motor vehicle, bicycle or invalid carriage.

You divide the 5v throttle supply, not the battery. You connect the red to one side of the preset and the black to the other side, then use the tap for the signal. Also, the controller checks for a zero throttle signal (less than 1.2v) at start-up. If it doesn't see that, it won't give any...

The guy didn't know how to set his P1 parameter! It was interesting to see that little Hitway BK2 MiRider clone in the back of the van. Did the owner hack it, or had he accidentally set the wrong wheel size so that the speed display was faster than what the bike went?

I eat currants, but I never heard of anybody eating volts.

They don't need reasonable grounds, they can check any vehicle, including EAPCs whenever they want.

It's very simple. The Government have laid down the rules for which type of electric bike you can ride. If it doesn't comply with those rules, it becomes a motor vehicle that needs licence, insurance, MOT, helmet, L-plates and must meet the construction and use regulations. If they catch you...

His photos don't show how he arranged his motor to resist the torque reaction. I think it's very dodgy doing it like that. If you don't use the provided arrangement, you need to fabricate your own torque arm or some other way to resist the torque. I've seen one of those motors with a cracked...

There are a load of cheap bluetooth BMSs on Aliexpress, but be careful because for some you have to buy the bluetooth box seperately. Always reas the reviews because some don't do what they're supposed to and some have secret passwords, etc.