Speedbox 1.1 for BAFANG - 4 PIN connection



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Unlock the speed limit of your electric bike with a Bafang SpeedBox tuning dongle kit. Unleash the full speed of your ebike engine and ride it like a derestricted e-bike should be!

Compatible with 36V Bafang MAX DRIVE mid-range motors (M300 / M400/ M420) and 2020 models onwards
NOT compatible with Bafang 8FUN and 2016-2019 motors.

For BAFANG M500 and M800 engines click here

The SpeedBox tuning kit derestrict the speed limit of your Bafang engine from the original 25 km/h to 50km/h. With the tuning activated all displayed data with be correctly halved thus if you display show 20 km/h then in reality you are riding at 40 km/h.

The SpeedBox is manufactured with high quality certified automotive industry components. The tuning hardware is completely sealed and protected by a rigid casing which guarantee for toughness, impermeability, and thus hardware longevity. Each SpeedBox is tested several times during and after the manufacturing process. Thanks to these high quality standards the SpeedBox comes with a Lifelong warranty.

The SpeedBox tuning kit is activated from the ebike control unit by just pressing the LIGHT button (the active lights icon will show up on the display). Now you ebike engine is derestricted for speed up 50 km/h.  
NOTE: In case you want to use both light connections with the installed SpeedBox Bafang, an additional light cable is necessary.

The SpeedBox tuning kit comes with original plugs and colour-coded wires for an easy and perfect fit. Installation manuals and videos provide step by step detailed instructions and are easy to follow and understand. The SpeedBox does not require any diagnostic tool for installation. 

Instruction manual video
Download Manual

NOTE:  If you are planning to install the SpeedBox on a brand-new bike, make sure you ride it for at least 1 -2 km before installing the tuning kit.

The operation of modified electric bike on public roads may be against the law in some countries. The seller takes no responsibility for damages resulting from the use of tuning products. Electric bikes equipped with tuning products can be used exclusively on private property and entirely at one’s own risk. The use of tunings may void the warranty of your e-bike. We strongly recommend using safety features and protective gear to prevent injuries at higher speeds.