You just bought a Xiaomi electric scooter – whether it’s a compact Mi Electric Scooter 1S, The powerful Pro 2 or the latest 4 Ultra, and now you have to build it right. It seems like it's hard: spin the screws, attach the steering wheel, and you're done? In practice, 8 out of 10 owners make critical mistakes already at the assembly stage, which then lead to backing steering, rapid wear of bearings or even falls during the ride.
This article is not just a retelling of instructions out of the box. We'll look at the hidden nuances that the manufacturer doesn't say: how to tighten the screws properly so as not to break the thread, why you can't ignore the brake adjustment, and what to do if the scooter is humming or not folding well after assembly, and you'll also find a unique tool compatibility table for different Xiaomi models, which will save you an hour of time searching for the right key.
Even if you've never had a technique before, following our guide, you'll assemble a scooter faster than coffee is brewed. And if something goes wrong, at the end of the article, you'll find a way to make a scooter. FAQ solve the most frequent problems.
What you will need to build: tools and preparation
Before you start, check the equipment. In the box with the Xiaomi scooter, you should find:
- 📦 Scooter in disassembled form (Deca) + steering-column)
- 🔧 A set of screws and nuts (usually in a separate bag)
- 🔑 Hexagon key (included in the kit, but often lost)
- 📄 Instructions in several languages (including Russian)
- 🔋 Charger (if purchased in the set)
But the complete tool is not enough for a good build.
- 🔧 End key to the end key 5 mm (for Pro models) 2/3 and 4 Series)
- 🔧 Hexagon by 4 mm (for Mi Electric Scooter) 1S Essential)
- 🛠️ Dynamometer key (optional, but highly desirable for precise tightening)
- 🧴 Lubricant for bearings (e.g. Liqui Moly Silicon-Fett)
- 🧤 Gloves (so as not to stain your hands and scratch the coating)
If you don't have a dynamometer key, don't panic, you can do without it, but then you have to control the force by eye. Tight screws are the main cause of failures in the steering column, and understretched ones will lead to backlash and dangerous "wafts" at speed.
⚠️ Warning: Never use carob keys or pliers to tighten the screws of a scooter! They tear the edges off and spoil the corrosion-resistant coating. Only end keys or hexagons.
Step-by-step: how to assemble the steering wheel of a Xiaomi scooter
The main part of the assembly is mounting the steering column to the deck, where it is important to observe the sequence and timing of the tightening. Consider the process with the example of Xiaomi Mi Electric Scooter Pro 2 (for other models, the nuances are indicated in the table below).
Step 1: Unpacking and checking details
- 📋 Get out the deck and steering column, make sure there are no burrs or damage on the thread.
- 🔍 Check that all screws from the kit are in place (usually 4 pieces for steering wheels). + 2 for folding mechanism).
- 🧲 If the scooter was in stock for a long time, lubricate the screw thread with graphite lubricant - this will prevent "boiling».
Step 2. Installation of the steering wheel on deck
- Put the steering column in the groove of the deck, make sure it sits down to the point, it should be a slight click.
- Make all 4 screws by hand without using the tool.
- Tighten the screws cross-cross (like the wheels of a car), first with a force of 5 N·m, then bring to 8-10 N·m.
Check that the steering wheel is flat (no skewing)
All screws are hand-made.
Use the end key, not the hexagon.
The force of the puff does not exceed 10 N·m-->
Step 3: Adjustment of the folding mechanism
If the scooter doesn't fold well or it doesn't turn around, the problem is the clamp bolt under the steering wheel.
- Weaken by 1-2 turns.
- Lubricate the carving and the puck.
- Tighten with a force of 6-7 N·m (for Pro 2) or 5-6 N·m (for 1S).
| Model scooter | Size of steering key | Moment of tightening of steering wheel (Nm) | Time of tightening of the folding mechanism (Nm) |
|---|---|---|---|
| Mi Electric Scooter 1S | Hexagon 4 mm | 8–9 | 5–6 |
| Pro 2 / Pro 3 | End 5 mm | 9–10 | 6–7 |
| 4 Series (4, 4 Pro, 4 Ultra) | End 5 mm (with extension) | 10–12 | 7–8 |
| Essential | Hexagon 4 mm | 7–8 | 4–5 |
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Puffing the screws cross-cross prevents distortion of the steering column and backlash when driving.
Brake and wheel settings: why it is important to do it right away
Many people miss this stage, believing that the brakes “work like that.” But unadjusted brakes are not only a discomfort, but also a risk of accident. For example, on the Xiaomi Pro 2, the rear disc brake often hits the rotor if the gap is not adjusted.
How to check the brakes:
- Raise the rear wheel (you can just tilt the scooter).
- Turn the wheel with your hand - it should rotate freely, without grazing.
- Press the brake lever: the wheel should be locked instantly, without failures.
If the brake is "cotton" or the wheel brakes by itself:
- 🔧 Relax the brake caliper mount bolts (key 5 mm).
- 🔄 Center the caliper so that the gap between the pads and the rotor is the same (1-1.5 mm).
- 🔒 Tighten the bolts back (moment 5-6 N·m).
Wheel check:
- 🚲 Make sure the tire pressure is normal (usually 35-50). PSI, see the instruction).
- 🔍 Check if there is any wheel beat (if any, the rim may be bent).
- 🛑 If the scooter is tubeless (for example, 4 Ultra), check the tightness of the nipple.
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After adjusting the brakes, drive 10-15 meters at minimum speed and check the gap again. The pads could "grow clean" and require re-tuning.
Electronics Connection: Battery, Display and Remote
If your Xiaomi scooter is equipped with a removable battery (as in the Pro 2 or 4 Series), it must be properly installed before first turning on.
How to connect the battery:
- Make sure the scooter is off (power button in position) OFF).
- Put the battery in the connector before you click. The Pro 2 should light up the indicator.
- Check that the contacts are not oxidized (clean with alcohol if necessary).
Display and remote setting:
- 📱 Download the official Mi Home app (for the first time) Android/iOS) and connect the scooter via Bluetooth.
- 🔄 Update your firmware to the latest version (this will fix the speed display bugs).
- ⚙️ In the application settings, activate Energy Saving Mode if you want to increase mileage.
⚠️ Warning: If the scooter doesn't turn on after the battery is connected, don't try to charge it in this state! this can lead to a short circuit).
What if the scooter does not turn on after assembly?
First Launch and Test Trip: What to Check
Before you go outside, run a test run in a safe place (such as a yard or an empty parking lot).
Pre-travel check:
- 🚦 Make sure the steering wheel is rigidly fixed (no backlash).
- 🔋 Check the charge level (at least 30% for the first trip).
- 🛑 Test the brakes at minimum speed.
- 🎛️ Check the operation of the gas (smoothness of the speed set).
What to do during the test trip:
- Accelerate to 10 km / h and brake sharply - the scooter should not "throw" forward.
- Drive over an uneven surface (such as paving slabs) - check for depreciation.
- Try folding and spreading the scooter on the go (if it is provided by the model).
If you notice at least one of these symptoms, stop immediately:
- 🔊 Extraneous sounds (squeaking, knocking, hum of bearings).
- 🔥 Smell of heat or overheating (especially from the controller).
- 🛑 Spontaneous braking or jerking.
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The first 50 km on the new scooter is the run-in period. Avoid maximum speed and sharp braking, so as not to damage the engine and brake pads.
Frequent Assembly Mistakes and How to Avoid Them
Even experienced owners sometimes make mistakes that are costly. TOP-5 Failures and how not to repeat them:
1.Straightened steering screws
Symptoms: the steering wheel turns with effort, creaking is heard.
Solution: Weaken the screws 0.5-1 Nm and check the backlash. Optimal force is when the steering wheel turns smoothly, but without the "bang."
2. Ignoring bearing lubrication
Symptoms: the wheel rotates tightly, a hum is heard.
Solution: Disassemble the wheel, clean the bearings of factory lubrication (often of poor quality) and apply a new one (such as Liqui Moly).
Incorrect battery installation
Symptoms: Scooter not switching on or showing error E02 (battery failure).
Solution: Reinstall the battery, making sure the contacts are clean and the connector sat down before the click.
Unregulated brakes
Symptoms: long stopping distance, squealing of the pads.
Solution: Center the caliper and check the wear of the pads (they should be thicker than 1.5 mm).
5. Missing the firmware update
Symptoms: The scooter “gluts”, shows speed incorrectly or suddenly slows down.
Solution: Update the software via the Mi Home app to the latest version.
Post-assembly maintenance: to make the scooter last longer
To build a Xiaomi scooter lasts more than one season, follow these rules:
1. Regular inspection of screws
Every 200 to 300 km, check the tightening of the steering column and the folding mechanism, and the vibrations gradually weaken the mounts when driving.
2. Cleaning and lubrication
- 🧹 After rain or riding on mud, wipe the scooter with a dry cloth.
- 🛢️ Once every 3 months lubricate the bearings and folding mechanism.
- 🔋 Contacts of the battery clean with alcohol 1 time in six months.
3. Storage
- 🏠 Keep the scooter in a dry place at a temperature of 10–25°C.
- 🔋 If you don’t use it for more than a month, keep your battery charged 40-60 times%.
- 🚫 Do not put the scooter on the wheel - only on the stand or sideways.
4. Firmware updates
Xiaomi regularly releases updates that improve stability and mileage, and check them in the Mi Home app every 1-2 months.
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If the scooter becomes worse to hold the charge, try to "accelerate" the battery: completely discharge it (before turning it off), then charge 100% without interruptions. Repeat 2-3 times.