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Do the tests first. They might save a lot of trouble.

Don't worry, we know that. I started fishing when I was 7 years old, and it was my passion for more than 50 years. I know how to work a bait. That bit I put in about the guy making a couple of mistakes was very deliberate. Some of us like the pantomime. It's top comedy.

Cut the connectors off, solder the wires directly and heatshrink them. You'll probably never have to disconnect them, but if you ever do, it's very quick to unsolder them. When soldered, you never have to worry about waterproofness, corrosion or any other connector problems, plus the joint has...

You need to check the voltages on the multi-pin BMS connector.

These should be high enough: https://www.ebay.co.uk/itm/Lowrider-Bicycle-Chrome-V-Handlebar-13-25-4mm-Chopper-Cruiser-Handle-Bar/233168090306?hash=item3649e6b4c2:g:oS0AAOSwO3BdemL8

Maybe check the connector for the speed sensor. I think you might have to drop the motor to get at it because some of the connectors are in the space between the motor and the frame. I would guess that it has a 5v supply. If no 5v on the connector, then something has probably blown inside the...

I always wanted one of them. I had a C15, and a Starfire, then a load of Gold Flashes. Now all I have left apart from modern bikes is an A10 that I built from scratch. It started life as a Gold Flash, but I changed it. It has the aluminium head off a Road Rocket. Chrome RGS type mudguards, Gold...

In the old days, before torque arms were commercially available, people had to improvise: Here's one of my self-made ones. Made with a file an angle grinder and welded out of scrap steel: and these front ones are hard to spot sitting in front of each fork leg:

The torque arms above fit on 12mm axles that are milled to 10mm wide with two flats. I can't remember whether the Suntour axle is like that, so you have to check. basically, the axle has ro be the same shape as the 12x10mm hole in the torque arm. There is no exact way to fit them, but you should...

Yes and no. The same controller can be sold to different customers with the current set differently depending on what the customer wants. Some controllers have a range of current that can be set in the settings. It might typically be set to 15 amps, but the setting allows up to 20A. The...

I've got some that come in my garden and steal all the birdseed that I put out. You can have them at a knock-down price, as I want rid of them. Let's say half the price of a northern Pigeon? If cash is still a bit tight up your way because of the lockdown and the price of rhubarb, I'd consider a...

When people join the forum, there's a box to fill in with where you live, but nobody wants to give that info out. If they did, somebody that lives nearby could volunteer to help them, but by keeping it a secret, they lose that opportunity. I see you chose not to fill it in!

The law is a funny thing. It's about precedents and interpreting wording. Here's what they say on the government website. There's clearly a mistake on the motor power, which should say "rated "power but says maximum output power. That makes virtually all ebikes illegal. There is no mention of...

It's "rated" power, which has no relationship to output power.

They won't send them outside of Australia!

You're getting all mixed up again. You need to calm down and engage your brain. We were talking about the video you linked in the OP, where the guy showed 4 cells in series without a BMS and he's explaining why the cells go out of balance. He said that the cells could have a different discharge...

I'm just a mere engineer, not a scholar. I never was much good at English; however, I did manage to get my Latin O-level grade C. It's weird that I could understand Latin better than English. Mind you, it was so exciting. There was prancing Pyrrhus holding up the sword while it glinted in the...

I did. He didn't.

He said the cells in series could discharge at different rates. They can't because they're in series, so the same current goes through all of them. He also said that they can discharge at different rates because of different internal resistance, but the same as before, the same current goes...

The writing on that chart you showed is too small to see what the chart represents. This is an actual commutation trace of an ebike motor: