Main Product Information
SpeedFun Furious Evo easy + is a tuning for ebike equipped with a Bosch Smart System motor that allows you to remove the 25 km/h speed block.
This speed release device is compatible only and exclusively with Bosch Performance Line CX (Gen 4 BES3) motors equipped with a magnet on the valve (Bosch Rim Magnet) regardless of the display or handlebar control.
This speed release device is compatible only and exclusively with Bosch Performance Line CX and Performance Line CX Race Limited Edition (gen.4 BES3) motors equipped with a magnet on the valve (Bosch Rim Magnet) with LED Remote/System Controller command (also compatible with Led Remote + Kiox 300/500, Intuvia 100, Purion 400 or System Controller + Mini Remote) or Purion 200.
The tuning kit manipulates the speed signal without altering the motor's power relative to pedaling speed. This guarantees a smooth motor control without speed limit interruptions. Depending on a tuning kit, some determine when assistance stops, while others remove the restriction entirely for continuous support. However, the achievable speed mostly depends on the eBike model. Achievable speed can be calculated using a simple formula:
Speed = Cadence [rpm] * Wheel circumference [mm] * Front Chainring Teeth / Rear Chainring Teeth * 60 [min/h] / 1.000.000 [mm/km]
Activation:
- Turn Off the ebike.
- Place the chain on the longest gear (the smallest rear sprocket).
- Position the left pedal at 11:00. From now on, do not turn the rear wheel.
- Turn On the ebike and wait for the complete check. Don't spin the rear wheel (not yet ..).
- Raise the rear wheel, give a strong pedal. Let the wheel spin over 30 km/h for a few seconds.
The system recognizes the acceleration and considers it as a command to activate or deactivate (cyclically) the speed release. Upon activation, the display (if present) shows the speed that passes from real to manipulated in the manner described above. When deactivated, the display shows the speed change from manipulated to real and the bike returns to its original condition.
This speed release device is compatible only and exclusively with Bosch Performance Line CX and Performance Line CX Race Limited Edition (gen.4 BES3) motors equipped with a magnet on the valve (Bosch Rim Magnet) with LED Remote/System Controller command (also compatible with Led Remote + Kiox 300/500, Intuvia 100, Purion 400 or System Controller + Mini Remote) or Purion 200. Bosch Gen4 motor codes start with BDU37** If your eBike has no Rim Magnet, then you need to choose a different product. This device is not compatible with ebikes equipped with a GPS system (Bosch ConnectModule).
When connecting Tuning Kit to an e-bike you will find connectors colored to make installation very simple. We have prepared detailed instructions to make installation easy for you. Disassembly of our tuning kit is just as easy. If you have any troubles with installation or disassembly, do not hesitate to contact us.
If you are planning to install Speedfun on a brand-new bike, make sure you ride it for at least 0.6 miles (1 km) before the tuning kit is activated.
Please note that the operation of this type of modified electric bikes on public roads may be against the law in some countries. The manufacturer takes no responsibility for damages resulting from the use Speedfun products. Electric bikes equipped with Speedfun products are not allowed to be used on public roads, cycling paths and public places. Electric bikes equipped with Speedfun products can be used exclusively on private property and entirely at one’s own risk. The use of Speedfun may void the warranty of your ebike.
We strongly recommend using other safety features and protective gear to prevent injuries in higher speeds.
Speedfun Products are thoroughly tested and we stand by their quality.
Speedfun provide 1 year warranty to all their Products!
Warranty does not cover damage resulting from eBike software updates. Remove the tuning kit before updating the software. Check with us first to ensure the kit is compatible with your updated eBike. We cannot guarantee that the kit will function the same after updates. Please exercise caution.

The bike feels completely different once derestricted - it's just like a whole different bike! The rides are so much more fun now! Tuning kits are safe to your bike and every ebiker should have one installed! You will love riding your ebike with it - guaranteed!
Matt - Owner of Two Wheels Empire
What Our Clients Say About It?
Works amazingly well and the MPH reads reasonably accurately as well as removing the manufacturer restrictions, my only criticism is the user and install instructions could dramatically improve. Overall an amazing well engineered product.
Ottimo prodotto però.....
Il dispositivo sembra funzionare bene peccato che per poter cambiare il suo settaggio bisogna scaricare una applicazione che sembra essere a pagamento. Con quello che costa il prodotto non mi sembra molto corretto.
3rd one I’ve had :(
To be honest I’m not sure about this kit. On the first kit I bought, the magnet wheel disintegrated after about 6 months use. To give them their due, Two-wheel Empire gave me a full replacement kit for half-price. However, the wheel has also disintegrated on the replacement kit after...read more
SpeedBox 3.0 B.Tuning for Specialized Levo SL
Excellent communication with the seller, very knowledgeable, answered all my questions. The Item arrived on time. Well packaged. The unit was easy to fit and set up using the free to download, Speedbox app. A very well made piece of equipment. Overall, an excellent company to deal with. I will...read more