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Don't forget that some "throttles" can be set to only allow 6km/hr, and some can be set to only give power when pedalling. That includes the one fitted to the Samebike 20LVXD, which looks like what she had. The 750w ones all have fat tyres. Either the police made a massive mistake or her bike...

Probably, they get an Amazon bike for £500 and wonder why they didn't do that in the first place.

When looking for an ebike, be careful not to over-specify. They all work, they all go 15.5 mph with the motor, and the cheapest and simplest are often the most reliable. As a general rule, you should avoid any bike that has special features, especially unusual batteries, because those things...

Firstly, there is no speed limit for any bike. I regularly go over 40 mph on mine down steep hills. The limit only applies to the motor, which must cut-off above 25 km/hr, and there's a +10% tolerance on that for measuring accuracy, so non-compliance can only be judged at 27.5 km/hr. Secondly...

Show photos when you ask questions.

There's no real heat in there, so should be OK. I think those LCDs come apart if you heat them up a bit to melt the glue, like you do with most phones these days.

It's normally C4=3 for a legal throttle.

Yes, they should be OK to manage the battery properly. Don't use recycle cells for an ebike.

Police always want to finish interactions with words of advice. I think they're trained that they must do that as a minimum. Here, AY_Audits shows how to deal with that. I don't know how he gets away with what he does. His card must be marked by every police force in the country for what he...

I'd like to know how the guy managed to cram a 560KWh battery into a frame bag. At 15 w/mile, he'd get a range of 37,300 miles. Joking aside, it shows what we're up against. Some cops can be extremely arogant. Can you imagine trying to argue it out with one who has it completely wrong, like that...

Those sort of projects are good for fun, but not worth it if your plan is to get a working ebike. You can buy 36v batteries ready to go for around £100. Also, if I were to do such a project, I's make two 36v ones in parallel rather than 18v in series.

That's the quickest an easiest way to do it. It works very well. No need to make it more complicated; however, it only works if the brake adapter and wheel spacing are right, which yours must be because it was working before. To make sure all that is right, you put the two screws in through the...

MiRider bikes have what they call a boost button, which causes the motor to give power as long as the pedals are turning, so that you can air pedal with no effort. The only bikes with type approved legal throttles are Wisper and Pedibal. There's also this one, which is more like a 15 mph moped...

The fuse is in the battery, so if the problem persisted after swapping batteries, it's not the fuse, so you can forget about that.

Observation of what happens on the LCD at the time of the cut-out would be the most useful thing you could do, as it shows the change in current and voltage. There are very many possibilities, but your description points to a battery connection issue. Places to look first would be the fuse and...

You could try recording the LCD with a video camera if you have one. You can get 1080P ones from Aliexpress for £3 now, or use your phone if you can find a way to hold it in position.

Some good points in it, but he's working for Park Tools. Most of us don't have them, and as long as you have basic DIY skills of measuring and cutting, you don't need them. The length isn't critical, so if you hack-saw it a bit crooked, you can file it level using spacers as a guide. I've done...

Just another thought about something that could cause your problem. The motor connector near the motor has a line that shows how far it must be pushed together. Pushed in tight is not enough. It must reach the line. Please confirm that it does indeed reach the line.

I was only joking. I knew it was atypo. I was just waiting for details of what your problem was. That VR400 was terrible. He made out that he knew a lot, but all he did was look stuff up on the internet and get it all wrong. Anyway, he's gone now and we're real experts here to sort you out...

It's unlikely that it's a reliable bike, but you're probably correct that it's used folding and electric because if it's an 803, it's a fake. Wisper never made an 803. The fakers are not very clever. They always get something wrong that gives them away.