SpeedUp FURIOUS is an electronic and smart speed release device that needs no external power.

It is designed for use with Bafang Modest Drive and Max Drive (M400, M420 etc.) motors, to circumvent the 25km/h speed limit and allow for an increase in its active assistance up to speeds of 50km/h by exploiting the excellent Bafang motor's power to the full.

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What is SpeedUp Furious?

SpeedUp FURIOUS is an electronic and intelligent speed release device that requires no external power supply.

It is designed for Bafang Modest Drive and Max Drive (M400, M420 etc.) engines to evade the speed block at 25 kmH allowing to increase its active assistance up to a speed of 50 KmH (info), fully exploiting the potential of the excellent Bafang engine.

Speedup FURIOUS can be mounted very simply by interposing it between the speed sensor and the motor using original connectors that do not alter the characteristics of electrical resistance and water tightness.

Once activated the tachograph of the bicycle will show the speed and relative data halved making it possible, by simply multiplying in mind for two, the calculation of the actual speed and kilometers traveled.

Furious for Bafang available in one version:

the device is activated and deactivated by simply pressing the “UP arrow” button or the Ebike light button. Can be installed without restrictions in all Bafang Modest Drive and Bafang Max Drive motors (M400, M420 etc.)


The main features


– Can be assembled/disassembled at any time

– It does not need any destructive modification to the original parts of the bicycle

– Allows you to adjust speed with assistance activated even 50 kmH (info)

– Installable in a few minutes, ready to use, plug and go

– Suitable for Bafang Modest Drive and Max Drive (M400, M420 etc.) engines

– It does not need batteries or external power supply

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Once the SpeedUp speed release device has been installed, the electric bicycle, being over the limit of 25 kmH, is equated to a moped and as such, if it circulates in public places, requires the homologation-registration by the Civil Motorization, it is subject to payment of road tax and insurance coverage, must have a license plate, cannot travel on cycle paths and the driver is obliged to drive with a license and must wear a helmet. Furthermore, driving a motor bike equivalent to a moped that does not comply with the aforementioned provisions involves the administrative seizure of the vehicle and fines that vary according to the infringement committed.
The manufacturer of the speed release system accepts no responsibility for any damage caused to the pedal assisted bicycles on which the device is mounted as well as to direct or indirect damage to people or things.
Please note that changing the bicycle invalidates the manufacturer’s warranty.

The operation of the SpeedUp devices is guaranteed for the software versions of the ebikes released up to the date of purchase of the device itself.
If the ebike is subsequently updated with software for which the SpeedUp device has not been tested, it may fail to work and SpeedUp does not respond with the guarantee.
Before updating your engine it is necessary to check the compatibility with your SpeedUp device.

NB: All the brands mentioned on this site are named exclusively to identify the models of engines and bicycles on which our devices are compatible. They are the property of the respective owners and are in no way related to our company.

Use your helmet, save your life!