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3 of those 7 wires are for the throttle and it’s just guesswork trying to figure out which ones they are. If you buy a new throttle try to get one with a 3 pin jst connector so it plugs straight into your new controller. My guess is red, black and one of the white ones. But chinese...

I have attached a photo of the B20 throttle/display which should help you identify the wires. But I think you will be better off by fitting a new 3 wire basic full twist throttle to the new controller.

Blimey, I just took a look at a B20 on Windgoo’s site. There are a lot of cockpit features on some of those bikes, cruise control button, full twist throttle, horn button, power on button. No wonder you don’t know where to connect the throttle to. Probably best to post up some photos, especially...

Do you have a throttle on your bike? If you don’t then it doesn’t need to be connected to anything.

The 3 pin connector with red white and black cables. It’s labelled turn the handle speed control knob

I have a vintage Rockrider Fire with a BBSHD and I use a backpack battery with an XT90 connector under the seat. I wouldn’t be able to mount a battery on my frame. I also fabricated a bash guard for the motor. I don’t like the way the cables are so vulnerable coming out of the bottom of the...

I think I may need to mount a pair of torque arms for the rear hub motor on my greaser. I like the look of the ones that hammer e-bikes sell. https://www.hammer-ebikes.com/store/p_2891207/adjustable-angle-heavy-duty-12x10mm-rear-torque-arm-1- Does anyone have any experience of these or...

Resurrecting an old thread with my first post. I just bought a second hand greaser and it certainly attracts some attention. I fitted a 52 volt battery and 30 amp KT controller with a KT03 lcd display to give it a bit more grunt. This is an early example, notice it has two 100mm bottom brackets...