How to increase the speed of the Xiaomi electric scooter: from firmware to upgrade iron

Xiaomi scooters are some of the most popular in the world, but factory speed limits (25-30 km / h) often disappoint owners. M365, Pro 2, 1S And Essential, where the manufacturer artificially lowers the power to comply with local safety standards, but it is legal to increase the speed of the scooter without harming the battery and the controller, if you know the nuances.

In this article, we will analyze all overclocking methods - from software (firmware, settings) BMS) It's important that not all methods are equally safe, for example, turning off the speed limiter through informal firmware can overheat the engine, and replacing the gears with more aggressive ones can cause accelerated wear on the transmission. We will tell you how to minimize risks and what to do if the scooter after tuning began to “twitch” or quickly discharge.

Warning: Acceleration to 40+ Not only do they require modifications, but they also require improvements in the braking system, and Xiaomi’s standard disc brakes are not designed for such loads, but will have to be modified or replaced with hydraulic brakes. Also remember that in most countries, the speed of scooters is limited by law (usually 20-25 km / h), and exceeding it can result in fines.

1. Checking the current speed and diagnosis of the scooter

Before you try to overclock Xiaomi, make sure that the problem is not in the technical condition.

• 🔋 Discharged or worn-out battery (capacity below 70% of nominal value).
• 🛠️ Contaminated bearings or wheel axis skew.
• 🔌 Oxidized contacts in the connectors of the controller or battery.
• 📉 Incorrect settings BMS (For example, the “eco-mode” is activated»).

For diagnosis, use the official Xiaomi Home app or third-party utilities like M365 DownG (for Android). They'll show you:

How to check the mechanics:

1. Lift the scooter and scroll the wheel with your hand - it should rotate without jamming and noise (if you hear a crunch, you need to replace bearings).
2. Check the tire pressure: for Xiaomi M365 norm - 2.5-3.0 bar.
3. Check brake pads – if they are less than 1.5 mm thick, the speed will fall due to friction.

⚠️ Attention: If the scooter does not accelerate above 15 km / h even on a flat surface, the problem may be in the cliff phase of the engine or a malfunction of the controller.

2. Software overclocking: firmware and controller settings

The most affordable way to increase speed is to change the firmware of the controller. M365, Pro, 1S and Essential there are custom firmware that removes the limit of 25 km / h:

• 📱 CFW (Custom Firmware – modified versions of the original software with speed, cruise control and recovery settings.
• 🔧 DownG is a firmware for reducing the speed limit to 15 km/h (relevant for countries with strict laws), but it can be inverted.
• ⚡ Turbo firmware - increase the maximum speed to 35-40 km / h, but require upgrade of brakes.

How to flash the controller:

1. Download the firmware for your model from a trusted source (e.g., the EScooterNerds forum).
2. Connect the scooter to the PC through STM32-Adapter (you will need a soldering iron to connect to the controller board).
3. Use the program. STVP Flash Loader Demonstrator for recording firmware.
4. After firmware, perform calibration of the accelerometer (in the scooter menu, hold the power button for 5 seconds).

Settings through applications:

If the firmware seems complicated, try changing the settings through:

• M365 Tools (Android) – allows you to increase the speed to 30 km / h without hacking the controller.
• ScooterHacking Utility (Windows) – for fine tuning KERS (recovery systems) and acceleration.

⚠️ Note: The controller’s firmware resets the mileage counter and may cancel the warranty. Also, after updating the scooter may not pass the check in the official Xiaomi service.

Download the firmware for your model|Check the battery charge (minimum 50%)|Prepare. STM32-solder-iron|Make a backup of the original firmware|Turn off Bluetooth and Wi-Fi on the scooter-->

3. Hardware tuning: replacement of gears and motor

If the software overclocking doesn't work, you'll have to upgrade the hardware.

• 🔄 Replacement of gears in the gearbox - increasing the gear ratio increases speed, but reduces thrust.
• 🔋 Installation of a more powerful motor (for example, 500W opportunistic 300W).
• ⚙️ Controller upgrades – replacing with a high current-constrained model (e.g, LYN 15A standard 12A).

Table: Effect of gear ratio on speed and thrust

To replace the gears, you'll need to disassemble the gearbox.

1. Remove the rear wheel and unscrew the gearbox cover.
2. Remove the standard gear (usually 16 teeth) and install a new one (such as 12 or 14 teeth).
3. Lubricate the bearings and assemble the gearbox, avoiding distortions.
4. Check the smoothness of the stroke - if the wheel rotates in jerks, the gears are not coaxial.

Engine upgrades:

For Xiaomi models M365 The Pro 2 is a good engine. QS-S3 500W (compatible with the original mounting:

• The maximum speed will increase to 35-40 km / h.
• Increased battery consumption (requires a battery capacity from the 15Ah).
• The controller must be updated under the new engine.

4. Optimization of the battery for acceleration

Speed is directly dependent on the voltage and current of the battery. - Xiaomi standard batteries (36V 7.8Ah) limiting maximum power:

• 🔋 Replacement with Li-ion 48V — Increases speed by 20 to 25 percent, but requires a compatible controller.
• ⚡ Parallel connection of additional cans (for example, +5Ah standard-battery).
• 🔄 Replacement BMS on a high-discharge current model (for example, Daly) 30A).

How to choose a battery for acceleration:

When replacing the battery, consider:

• The weight of the scooter will increase by 2-4 kg.
• It will require balancing the cells every 500 km.
• LiPo batteries have a shorter lifespan than Li-ion batteries (300-500 cycles vs 800-1000 cycles).

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Before buying a new battery, check it for internal resistance with a tester (normal: <50 High resistance causes voltage to subside under load and speed to fall.

5. Improved aerodynamics and weight loss

A subtle but effective way to increase speed is to reduce air resistance and weight, and at speeds above 30 km/h, aerodynamics plays a key role.

How to lose weight:

• 🚲 Replace standard tires with slicks (smooth tires without tread) – saving up to 300g per wheel.
• 🔧 Remove unnecessary accessories: trunk, footrest, additional headlights.
• 🔋 Use a carbon frame (e.g. from Xiaomi Pro 2 Carbon) - minus 1.5 kg.

Aerodynamic improvements:

• 🪁 Place the sleeve on the front fork (can be done) 3D-print out).
• 👕 Wear tight clothing and a helmet with low drag.
• 🛴 Optimize your body position: lean forward 30-45° Reduces resistance by 15-20%.

Experiments show that the combination of creams, removal of the trunk and fairing gives an increase in speed by 2-4 km / h without changing the motor or battery.

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Slicks are only suitable for flat asphalt! On gravel or wet roads, the grip deteriorates by 2-3 times, which is dangerous at high speeds.

Upgrade of the braking system for safety

Increase speed to 35+ The standard Xiaomi disc brakes are designed for a maximum of 30 km / h - with emergency braking at high speed, the braking distance increases to 10-15 meters.

Improvement options:

• 🔧 Hydraulic brakes (e.g., Zoom) HB-100) — reduce the braking distance by 30-40%.
• 🛠️ Ceramic pads - better remove heat and serve longer.
• 🔄 Double brakes (front brakes) + rear) separately operated.

How to install hydraulic brakes:

1. Remove the standard mechanical brakes and rotor.
2. Install a new rotor (recommended diameter: 160 mm).
3. Fix the hydraulic caliper and pump the system (remove the air).
4. Adjust the free stroke of the lever - it should be pressed with a force of 1.5-2 kg.

After upgrading the brakes, be sure to test them at a safe speed (15-20 km / h), gradually increasing the load.

⚠️ Attention: If after installing the hydraulics brakes "cotton" or pedal fails, there is still air in the system. Pump the brakes again, otherwise the braking efficiency will fall by 2 times.

7. Alternative methods of dispersal (with risks)

If standard methods fail, some owners resort to extreme modifications, which increase speed, but reduce the life of the scooter or violate the law.

High-risk methods:

• ⚡ Disabling the current limiter in the controller (can burn the motor).
• 🔥 Use of LiPo batteries 6S+ (fire-fighting).
• 🚀 Installation of the second motor (requires a complete reworking of the frame).
• 📡 Blocking the signal GPS (to cheat the restrictions on geofences).

Consequences of illegal dispersal:

• In most countries, the speed of electric scooters is limited to 20-25 km / h. Exceeding can entail a fine (for example, in Russia - up to 1000 km / h).₽, in the EU - up to 500€).
• Insurance companies refuse to pay in case of an accident if the scooter is modified.
• Xiaomi warranty is voided in case of any interference with firmware or hardware.

8.Support after dispersal: how to prolong the life of a scooter

After any tuning, the scooter requires increased maintenance.

• 🔧 Check the motor and controller mounts every 200km - vibrations at high speed weaken the bolts.
• 🔋 Balance the battery every 3 months (use the iMax balancer) B6).
• 🛠️ Lubricate bearings every 500 km (use Mobil 28 lubricant).
• 🌡️ Control the temperature of the controller if it is heated above 60°C, install an additional radiator.

Signs that the scooter needs repair:

• Ugs during acceleration - possible wear of gears or problems with the Hall sensor.
• Maximum speed reduction by 10+ km/h – battery discharged or contacts oxidized.
• Extraneous sounds (squeaking, crunch) - you need to replace bearings or gearbox.

Use it for diagnosis. M365 Tools or EScooterDiagnostics.These apps show errors in real time and help prevent breakdowns.

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After acceleration to 35.+ Be sure to install rear-view mirrors and LED turn signals at high speed, and the visibility and signaling of maneuvers are critical to safety.

FAQ: Frequent questions about the acceleration of electric scooters Xiaomi