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I don't know the detail of that model, but in most cases the motor will be reusable. Add controller and display, always buy as a pair for compatibility, and usually on here KT is recommended. But it looks like your battery is inside the frame, so a replacement will either need mounting...

Bad news: you may have damaged the battery. It shorted out across the charge port, and didn't catch fire, so some protection mechanism saved you! But it may be a destroyed BMS, or it may be an internal fuse in the battery. Good news: second hand same bikes go for £200 or so. Maybe buy a second...

Jumps are a bad idea if you want your bike to last! Landing with your weight on the pedals puts high stress through the crank area, which is where the sophisticated and potentially slightly delicate torque sensor lives in mid-drive bikes. Asking for trouble putting more punishment than necessary...

They won't be circular, and the B01S fits many Shimano calipers. Easy to check, although removing wheel is needed for a good look. Look from the underneath view and you should see the straight sides. B01S work fine, but have been superceded twice by B03S and now B05S. Longer lasting is the...

OK, the consistency eliminates some possible causes. Not the throttle, not the PAS, definitely the algorithm, which might respond to settings, although I can't help there. If this is not normal for a KT setup, perhaps someone with greater experience is able to shed light. I wonder if the use...

How does it behave if you ride in level 5 continuously, and stop and start pedalling? Same delayed ramp up each time you resume, or different?

For It sounds like a badly tuned feedback loop, severely overdamped. I don't know firsthand anything about your controller, but a poorly behaving algorithm sometimes indicates a missing or incorrect input. Another experiment would be to go much slower in the bottom of the dip, say that target...

Not much to go on in that question! Only a million or three models to analyze...

Back to your wheel build: why a '1 cross' pattern on such a large wheel with powerful motor? Surely a '2 cross' with its larger spoke angle would have significantly lower spoke loads under power?

Putting aside handlebars and so on, is the amount of help from the motor enough for you, and is the amount of effort you have to put in to get the help low enough for you, is what I'm asking. If the motor aspect is capable of being suitable then changing bars and so on is all possible. If it...

It would be useful to know if, in the course of your so far endless quest, you have tried the higher spec mid-drive motors, and whether, purely from an assistance point of view whilst riding, ignoring weight and balance when handling/lifting, they met your needs.

Three bargains there, and all in my favourite colour.

A bit like building a house. You can have a good house, a cheap house and a quick house. But only two of those three.

There are simple ways to directly test the MOSFETs using a multimeter. Links to that and hall sensor testing here. https://ebikes.ca/learn/troubleshooting.html

Not in the list of PAS from BSI. Perhaps only listed there when finalised/approved. Surprising a draft version doesn't easily appear in search results. Surely not a numerical typo?

Physics stops the current because the battery cannot rise to a voltage higher than the input. So it is essential that the 'charger', in this case the solar charge controller, is set to, or designed to supply, the correct fully charged voltage. The BMS looks after balancing the cell groups, and...

BTW I wouldn't put too much effort into the ice cream outside schools idea as I think you'll get banned immediately. Schools do not want distractions at the pickup/drop-off points/times for safety reasons. Interesting project in the right place.

Most solar ebike systems use a 'boost' solar charge controller and a panel(s) with voltage lower than the battery voltage. The charge controller is programmed to output the fully charged voltage of the battery, so 42V for a 36V system, 54.4V for a 48V system. My panels produce about 18V, and...

Good luck.

When you say spun, do you mean the throttle only works if the wheel is already rotating? If this was a normal bike system, that would suggest that it only works if the PAS is giving a signal, and that the PAS only gives a signal for the wrong direction of rotation. So does your scooter system...