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It’s fine if it’s 70% charged. Not good if it’s 100% charged.

Why don’t you ask Jimmy at Insat what the maximum current that you battery can deliver? Then you will know the biggest controller you can fit. And then you can plug that information into the Grin simulator to see how well your motor will perform.

Here is an example for your motor using a 20 amp controller. You can adjust the settings to see how far you can take it before the motor overheats. Put the overall wheel diameter in which includes the tyre. Don’t use the rim size...

You need to know the maximum current the battery can deliver. If you fit a bigger controller that takes a higher current than the battery can deliver you will ruin the battery. Your motor is easily capable of 1000 watts, but only if the other components are rated high enough. You can use the...

What is the maximum current that your battery can safely deliver? You need to consider all three things, motor, controller and battery, otherwise something is going to break.

It’s a Bafang G062 with a 9 turn Winding. It’s rated at 250w, 500w, 750w and 1000w, depending upon which country you live in. Here is the 2003 Bafang workbook with the specifications for all their motors. https://bafang-e.com/fileadmin/user_upload/BAFANG_Workbook_OEM_2023.pdf

There are many videos on youtube explaining how to test mosfets using an ordinary multimeter. It’s quite difficult to explain in a post. You need to activate and deactivate the gate and check the source and drain turn on and off. And to do that you need to open up the controller. And make sure...

Some of the blown controllers and displays I have seen posted on here are due to water ingress. Most are due to people wiring them up wrong and then post saying why does my controller and display not work.

The fuse will protect the wiring. It won’t stop your controller from blowing. If you get a short circuit there is enough stored energy in the capacitors to blow the fets way before the fuse thinks about blowing.

How is a fuse going to stop a controller from blowing up?

Do a bit more testing first to see if there is any communication between the display and controller. You mentioned that your PAS works, so one test would be to determine if the PAS sensitivity changes between 1 and 5. If it does then the display is transmitting data to the controller. If PAS...

It could well be a compatabilty problem with your 1t4 cable.

There are plenty of unregistered motocross bikes for sale in the UK both new and used. And also a thriving market in stolen ones.

My one went kaput once on my BBSHD and it didn’t stop me from riding it, but I fixed it when I got home. The only thing that stopped working was the odometer. They are very flimsy and vulnerable, especially on an MTB with lots of low level branches about to get it caught up on.

Of course, here is the Honda CRF range https://www.honda.co.uk/motorcycles/range/off-road.html

What motor is it?

It’s a big problem in the United States as well and state laws are currently being changed to bring e-bikes under control.

I replaced a Tektro 2 pot caliper with a Risunmotor 4 pot caliper on a 180mm front disc and kept the original Tektro hydraulic brake assembly. My braking improved and I don’t have any problems with leverage. It’s still the same Tektro sloppy feeling as it was before. I am also not a Tektro fan boy.

24 Surron Light Bee and 48 Surron Ultra Bee were registered in January 2024 in the UK, non in February. 24 Light Bee in December 2023 as well. https://www.mcia.co.uk/downloads/download/1536

These things are awesome, but I would kill myself on one of them.