replace the button of switch motor mode

GN27 Installation Crank

GN68 replace the controller

GN29 replace the mainwires

GUNAI Y controller replace and install

replace the button of switch motor mode

GUNAI-M2 2000W dual motor electric bike full suspension

GUNAI-Y/T unlock the speed

GUNAI-Y/T limit the speed to 25km/h

GUNAI-T install video

GUNAI-Y Install video

how to take out the inner tube

GN27 install the fender