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Motorbike ones are different. I have one of those double ball clamp type, which holds it nice and rigid. The mass is no problem on a 230kg motorbike and it's completely protected inside the fairing. When you fall off a bicycle, you rarely do any significant damage to it -maybe a scrape on the...

Thick black joined to the cell-pack. Not the black joined to the battery terminal because it's switched by the BMS.

I can't see what you're doing, but, as I said, the battery would normally switch off at 30v. After that, you can measure something like 12 to 18v leakage on the connector. The cell pack is still 30v. What current were you testing it at?

There's nothing to stop you fitting a front or rear motor kit, but you're going to have to use a bit of imagination or lateral thinking when it comes to the battery. A normal rack battery will be no problem as long as you're not short and have the seat very low.

They're a very big Chinese brand, though not so much of a presence in UK.

You don't fish the wires out through that hole. Instead, you take the cover off the side of that compartment, which gives you access to everything inside.

It will work if you flip the disk!

You should always measure the cell voltages from the common ground. That will tell you where your missing voltage is.

you should always test a new controller with a throttle, not the PAS.

That's how it should be.

Doesn't your tester have LVC to save damaging the battery? is the battery still providing current at 14v? If not, it's pretty normal to see that sort of voltage after the BMS has cut off. It's just leakage through the mosfets.

Here's my advice: Don't buy a rigid mount otherwise you smash your phone when you fall off. Think about weight. After you spent loads of money to get a bike that's 500g lighter than a cheaper one, you don't want to add a 500g phone mount. There is always a better chance of fitting a thin clamp...

https://www.ebay.co.uk/itm/JST06R-JWPF-VSLE-D-Mini-Connector-Kits-2-8-Way-Pin-Motorbike-Motorcycle-Car-Auto/263873679303?ssPageName=STRK%3AMEBIDX%3AIT&var=563256332915&_trksid=p2057872.m2749.l2649

Don't you use Ebay. There are only 15,000 on there to choose from: https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=bicycle+phone+holder&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=folding+bike+disc+brakes

It looks like your controller has comms to the battery, so you can only fit the same or a compatible battery. If it were my bike, I'd chuck the controller and everything that's attached to it apart from the motor, then replace it all with a KT controller kit from topbikekit, which would give you...

You can repair it with UV glue: https://www.ebay.co.uk/itm/30GR-LIGHT-PLASTIC-REPAIR-UV-RESIN-GLUE-FOR-PLASTIC-CHARGING-CABLE-FIX-UV-TORCH/264718690189?hash=item3da276a78d:g:ssAAAOSwz8teraLQ I repaired my glasses with it three months ago after i snapped the side right off. You have to add a...

Which motor did you get? Why does it have to come from UK?

I'm going to guess that your battery is under-rated for what you need. Start a new thread and provide all details about your kit.

Are you sure? Do you understand back emf and the motor constant Kv? If not, ask.

https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313&_nkw=folding+bike+disc+brakes&_sacat=0