Electric bikes limit motor assistance through the display, controller, speed sensor or firmware. The correct removal method depends on the system fitted. Identify the display, motor and controller before changing settings or wiring to avoid faults or damage.
What Does an Electric Bike Speed Limiter Do?
A speed limiter tells the motor when to reduce or stop assistance. It does not normally prevent the wheels from turning faster. You can continue pedalling beyond the cut off point, but the motor will no longer add power.
The limiting function may be stored in the display, controller, motor firmware or speed sensor. Some basic controllers also use a separate limiter wire.
Removing the limiter normally changes the speed at which assistance stops. It does not automatically increase motor power, battery voltage, torque or controller current.
Where Is the Speed Limiter Located?
The speed limiter is not always a separate component. On many modern electric bikes, it is simply a setting stored in the controller.
Start by checking the display. Look at the front, back or underside for a model number. Common generic displays include S866, SW900, S830 and KT LCD models.
The controller may be fitted inside the frame, below the battery, behind a side panel or inside an external box. It controls how power moves from the battery to the motor.
Mid drive bikes often have a speed sensor near the rear wheel. A magnet attached to a spoke or brake disc passes the sensor during each wheel rotation.
Some basic hub motor controllers also have a separate limiting connector. It may appear as a small plug, a looped wire or two matching wires joined together.
Branded systems from Bosch, Shimano, Bafang, Brose and Yamaha often store the limit in locked firmware. These usually require model specific tools or tuning devices.
Identify the Limiter Type First
Do not open the controller or disconnect wires before checking the simple options.
First, identify the display model and look for a manual. Search for terms such as maximum speed, speed limit, advanced settings, wheel size or parameter settings.
Next, identify the motor brand and model. A generic rear hub motor may use a basic controller, while a branded mid drive motor may use closed communication between the motor, display and battery.
Check whether the bike connects to a mobile app. Some manufacturers place riding and speed settings in the app instead of the display.
You should also inspect the rear wheel for a separate speed sensor and magnet. This will show whether the bike calculates speed through an external sensor or through the motor itself.
Method 1: Change the Speed Limit Through the Display
Changing the display setting is usually the easiest method.
Many generic displays include an advanced menu for wheel size, voltage, pedal assistance and maximum speed. The menu name and button sequence depend on the display model.
A typical process is to turn on the bike, enter the settings menu and open the advanced parameters. Find the maximum speed or speed limit value, increase it, save the setting and restart the bike.
Some displays use parameter numbers instead of clear names. The speed setting may appear under a code such as P08, but the same code may control something completely different on another display.
Always check the manual for the exact model. Changing the wrong parameter can affect the speedometer, battery reading, pedal assistance or wheel size calculation.
If the value returns to its original number after restarting, the controller may be overriding the display setting.
Method 2: Use the Manufacturer App
Electric bikes with Bluetooth or WiFi may allow the rider to change settings through a mobile app.
Connect the bike to the correct manufacturer app and open the riding, motor or advanced settings menu. Look for maximum assistance speed, speed limit, riding mode or region settings.
After changing the value, synchronise the app with the bike and restart the system.
Some apps display the speed value but do not allow the rider to edit it. Others require a service password, dealer account or different firmware version.
Avoid installing unofficial firmware from an unknown source. An incorrect firmware file may stop the display, battery and controller from communicating correctly.
Method 3: Reprogramme the Controller
If the display does not offer a speed setting, the limit may be stored directly in the controller.
Some controllers can be connected to a computer using a programming cable. Compatible software may allow you to change maximum assistance speed, wheel diameter, pedal assistance response and motor current.
Use only a cable and programme designed for the exact controller. A plug may physically fit while using a different communication system.
Bafang motors, for instance, may use UART or CAN communication. A cable made for a UART motor may not work with a CAN based system.
Before editing anything, save a copy of the original controller settings. This will allow you to restore the bike if the new configuration causes errors.
Change only the speed value unless you understand the other settings. Increasing current at the same time places more load on the battery, controller and motor.
Method 4: Disconnect the Limiter Wire
Some simple hub motor controllers use a separate wire to activate a lower speed setting.
The connector may appear as a looped wire, two matching wires joined together or a small two pin plug. It may also be labelled speed limit on the controller diagram.
Turn off the bike and remove the battery before inspecting the wiring. Follow the controller loom and compare the connectors with the wiring diagram.
Disconnect the plug rather than cutting the wire. This keeps the change reversible and reduces the risk of damaging the loom.
Do not identify a limiter wire by colour alone. Wiring colours are not standard. A similar plug may control the brakes, throttle, lights, display or motor sensors.
If the manual does not show a limiter wire, the speed limit is probably controlled through software or the speed sensor.
Method 5: Adjust the Speed Sensor
Many mid drive electric bikes calculate speed using a sensor and magnet near the rear wheel.
The controller counts each time the magnet passes the sensor. It then combines that signal with the wheel circumference to calculate speed.
Some derestriction methods change the signal received by the sensor. This may involve repositioning the sensor, changing the magnet arrangement or installing a mechanical device that reduces the number of signals sent to the controller.
The controller may then believe the bike is moving more slowly than it actually is, allowing motor assistance to continue beyond the original cut off point.
However, this can also make the speed display inaccurate. Trip distance, average speed, recorded mileage and estimated range may also become unreliable.
If the sensor and magnet are moved too far apart, the bike may stop recording speed completely. The display may show zero or produce a sensor error.
Method 6: Install a Tuning Chip
A tuning chip changes the speed signal before it reaches the motor controller.
These devices are commonly made for systems from Bosch, Shimano, Brose, Yamaha, Giant, Specialized and Bafang. They are normally connected between the motor and speed sensor.
Some chips fit inside the motor cover. Others connect near the rear wheel sensor.
Compatibility is essential. Before selecting a chip, confirm:
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Motor brand and model
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Motor generation
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Display type
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Connector type
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Firmware version
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Communication protocol
A chip designed for one Bosch generation may not work with another. The same applies to Shimano, Yamaha and Bafang systems.
Follow the fitting instructions supplied for the exact motor. Do not force connectors together. Many motor plugs use small alignment marks or keyed shapes that can be damaged easily.
After installation, check whether the displayed speed is still accurate. Some tuning chips divide the displayed speed after a set point, while others continue to calculate the actual speed.
Method 7: Replace the Controller and Display
Some electric bikes use a fully locked controller. The display may have no advanced menu, the app may not allow changes and the controller may reject third party programming tools.
In this situation, replacing the controller and display may be the only practical option.
A replacement controller must match the battery voltage, motor wiring and display protocol. It should also support the existing pedal sensor, brake cut off sensors, throttle and light connections.
A 48V controller is not automatically suitable for every 48V electric bike. The connectors may look similar while using different wiring orders or communication systems.
Replacing the control system may also change the way the bike delivers power. The new controller may provide stronger acceleration, slower response or different assistance levels.
This method requires more work than changing a display setting and should be treated as a complete control system replacement.
Does Removing the Limiter Increase Motor Power?
Removing the speed limiter does not normally increase the rated motor power.
It allows the controller to continue providing assistance at a higher speed. The actual result still depends on the motor, battery and controller.
A bike may show only a small speed increase if the battery voltage is low, the motor has reached its maximum rotational speed or the controller cannot supply more current.
Rider weight, tyre pressure, wheel size, hills and wind also affect the result. Heavy fat tyres create more rolling resistance than narrow road tyres.
Air resistance rises quickly as speed increases. A motor may need much more power to gain only a few extra miles per hour.
Why Is the Bike Still Limited?
Some bikes have more than one speed limit. The display may accept a higher value while the controller or motor firmware keeps the original cut off point.
The manufacturer app may also overwrite manual settings after the system reconnects.
Other common causes include:
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The new value was not saved
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The wrong parameter was changed
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The controller is locked
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The tuning chip is not compatible
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The wheel size setting is incorrect
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The speed sensor still sends the original signal
Restore the original settings before trying another method. Changing several components at the same time makes faults much harder to identify.
How to Test the Bike After Removing the Limit
Check all connectors before turning the system back on. Make sure no cable can touch the wheel, chain or crank.
Turn on the display and confirm that it starts normally. Move the bike slowly and check that the speed sensor records movement.
Test the brake cut off sensors before applying strong motor assistance. The motor should stop when either brake lever is pressed.
Begin with the lowest assistance level. Increase speed gradually and listen for unusual motor noise. Watch for error codes, unstable assistance or sudden power loss.
You should also check motor temperature, controller temperature and battery use. Stop testing if the motor cuts in and out or any electrical component becomes unusually hot.
Common Problems After Removing the Speed Limiter
Incorrect Speed Reading
An incorrect wheel size setting or modified sensor signal may cause the display to show the wrong speed. Restore the correct wheel diameter and inspect the sensor position.
Reduced Battery Range
Higher speeds use more energy. The battery may discharge much faster, especially when riding uphill, carrying a heavy load or travelling against strong wind.
Motor or Controller Heat
Long periods of high speed increase electrical load. A motor that stays cool during normal riding may become much hotter after the speed limit is changed.
Error Codes
A branded motor may detect an unusual speed signal. Remove the tuning device, return the sensor to its original position and restart the system.
Unstable Assistance
Incorrect controller settings can make the motor respond too sharply or stop without warning. Restore the saved factory settings and test each change separately.
Can the Original Speed Limit Be Restored?
Most methods are reversible if you keep the original settings and components.
You can normally restore the bike by returning the display value to its original setting, reinstalling the controller configuration or reconnecting the limiter plug.
Sensor modifications can be reversed by returning the sensor and magnet to their original positions. A tuning chip can normally be removed, while replacement controllers can be exchanged for the original parts.
Take photographs before disconnecting wires and save every original software setting. This makes restoration much easier.
A Long Range Option from Tesway
Removing a speed limit cannot improve battery capacity or motor output. Riders who need stronger performance for long journeys may prefer a bike designed for that purpose. Tesway long range electric bikes combine large capacity batteries, powerful motors, full suspension and hydraulic brakes. They are built for hills, mixed surfaces and longer rides where stable power delivery and extended range matter more than changing a basic commuter bike.
Conclusion
Removing an electric bike speed limiter starts with identifying where the limit is stored. Basic bikes may use display settings, an app or a separate connector, while advanced systems may require controller programming, sensor changes or a tuning chip. Make one change at a time, keep the original settings and test every function before continuing.
FAQs
Can every electric bike speed limiter be removed?
No. It depends on the motor, controller, display and firmware. Some systems are easy to adjust, while others use locked software.
Does removing the limiter increase motor power?
No. It only changes when motor assistance stops. The motor, battery voltage and controller output remain the same.
Why is my bike still limited after changing the display?
The controller or firmware may have another speed limit. The new display setting may also fail to save correctly.
Can I restore the original speed limit?
Usually, yes. Restore the original settings, reconnect the removed part or remove any tuning device that was installed.
