![]()
No images available
Tap to enlarge
![]()
2020 BMW C 400X Overview
BMW C 400X is a scooter motorcycle, displacing 350 cc. Power comes from a Single cylinder, four-stroke engine running Overhead Cams (OHC) valve actuation, a compression ratio of 11.5:1. On the performance side, it delivers 25.3 kW @ 7500 rpm of peak power and 34.3 Nm @ 6000 rpm of torque. Top speed is factory-quoted at 139 km/h. On the road, the 2020 C 400X tips the scales at 204 kg, carries a 12.8-litre fuel tank, offers a seat height of 775 mm and spans a 1564.5 mm wheelbase. That's roughly 50.1 kg heavier than the average scooter motorcycle in our database. The full 2020 BMW C 400X spec sheet below covers every technical detail, from suspension travel to tyre sizes.
2020 BMW C 400X compared with other bikes in the Scooter category
We checked the recorded figures for the 2020 BMW C 400X against up to 1110 bikes in the Scooter category in our database, counting each model once at the model year nearest to this one.
- Only 36 of the other 368 bikes in the Scooter category have a higher top speed than the 139 km/h of the C 400X.
- With 350 cc, the C 400X has the joint 154th largest engine displacement of 1110 bikes in the Scooter category, 81% above the category average of 193 cc.
- Torque of 34.3 Nm is higher than that of 662 of the other 795 bikes in the Scooter category.
- Narrowing the field to the 145 models within five model years of it, the top speed of 139 km/h is higher than that of 126 of the other 144.
Versus the 2019 model
Compared with the 2019 model, peak torque dropped from 35 Nm to 34.3 Nm (-0.7 Nm). Wet weight, displacement, seat height and top speed are unchanged.
2020 C 400X - Pros & Cons
Strengths
-
⚡
Strong power output: With 25.3 kW @ 7500 rpm and 34.3 Nm @ 6000 rpm of torque on tap, the C 400X is no slouch for its class.
-
🔧
Fuel injection: Fuel injection means consistent cold starts and clean throttle response without the fussiness of a carbureted setup.
-
🛑
Strong front braking: Stopping power up front is strong thanks to the disc setup, with plenty of room to upgrade further with braided lines.
Considerations
-
ℹ️
Age-related wear: Nothing specific stands out as a weak point on the C 400X - the usual used-bike checks (service history, consumables, tyres) apply.
Wear Points & Servicing Notes
Cooling system servicing
C 400X's Liquid cooled setup is low-maintenance provided the coolant interval is kept - old, acidic coolant is the main cause of long-term corrosion in the water passages.
Fuelling & injector care
The fuel injection on the C 400X needs little beyond good fuel and periodic use of an injector-cleaner additive - no jetting or float-bowl maintenance to worry about.
Brake disc and pad wear
Braking up front comes from 2x 265mm Rigid discs 4 piston caliper - solid stopping power, with disc and pad wear best checked on the same schedule as tyre changes.
Suspension condition on used examples
The C 400X's suspension runs 35mm Telescopic forks at the front. The rear uses Aluminum double-sided swing arm, double spring strut, adjustable spring preload. Fork-seal condition and rear linkage play are the two things worth checking before buying used.
Frame & chassis check
Built around a Tubular spaceframe, the C 400X's chassis is straightforward to inspect: look for corrosion, cracks or repair welds around stress points like the head-stock and swingarm mounts.
C 400X - Buying & Maintenance Guide
What to check before buying
Before handing over money for a used 2020 BMW C 400X with its 350 cc scooter, cover the fundamentals: service book and oil change history, drivetrain wear, and any sign of oil weeping around the casings. Now 6 years old, this scooter is as likely to show age-related wear (perished rubber, seized fasteners, degraded seals) as mileage-related wear. Cold-starting it yourself tells you a lot - a healthy C 400X should catch quickly and settle into a smooth idle.
Oil and filter changes
Nothing protects the C 400X's 350 cc single cylinder, four-stroke like disciplined oil changes - stay on the manufacturer's schedule (roughly every 6,000 km or annually). With an 11.5:1 compression ratio, running the octane grade specified in the manual matters more than on a lower-compression engine. Match the viscosity grade to what the owner's manual specifies, not what's cheapest.
Fuel system care
Fuel injection on the C 400X needs little attention beyond decent fuel and an occasional system-cleaner additive. Anything left standing for three months or more should have its fuel drained and replaced before it varnishes the injectors.
2020 BMW C 400X - Frequently Asked Questions
What engine does the 2020 BMW C 400X have?
The 2020 BMW C 400X uses a Single cylinder, four-stroke engine with 350 cc of displacement. It is liquid cooled.
What is the top speed of the 2020 BMW C 400X?
The 2020 BMW C 400X has a factory-quoted top speed of 139 km/h. Real-world speeds vary depending on rider weight, conditions and state of tune.
How much does the 2020 BMW C 400X weigh?
The 2020 BMW C 400X weighs 204 kg. This is the manufacturer's wet figure.
How much power does the 2020 BMW C 400X make?
The 2020 BMW C 400X produces 25.3 kW @ 7500 rpm of power and 34.3 Nm @ 6000 rpm of torque. These are peak figures.
What is the fuel tank capacity of the 2020 BMW C 400X?
The 2020 BMW C 400X has a 12.8-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 213-256 km between stops.
Is the 2020 BMW C 400X suitable for shorter riders?
The 2020 BMW C 400X has a seat height of 775 mm. This is a moderate seat height that suits a wide range of rider heights.
What brakes does the 2020 BMW C 400X have?
The 2020 BMW C 400X uses 2x 265mm Rigid discs 4 piston caliper at the front and single 265mm disc 1 piston caliper at the rear.
What tyre sizes does the 2020 BMW C 400X use?
The 2020 BMW C 400X runs 120/70 ZR15 front and 150/70 ZR14 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.
What gearbox does the 2020 BMW C 400X have?
The 2020 BMW C 400X is fitted with a Continuously variable CVT belt transmission transmission.
BMW C 400X Spec Evolution
The BMW C 400X was produced across 5 model years (2019-2025). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.
| Specification |
2019 |
2020 |
2021 |
2023 |
2025 |
| Max Power |
25.3 kW / 34 hp @ 7500 rpm |
25.3 kW / 34 hp @ 7500 rpm |
25 kW / 33.5 hp @ 7500 rpm |
- |
25 kW / 33.5 hp @ 7500 rpm |
| Wet Weight |
204.0 kg / 449.7 lbs |
204 kg / 450 lbs |
206 kg / 454.1 lbs |
204.0 kg / 449.7 lbs |
208 kg / 458.6 lbs |
| Dry Weight |
193 kg / 425.5 lbs |
193 kg / 425.5 lbs |
195 kg / 429.9 lbs |
193 kg / 425.5 lbs |
197 kg / 434.3 lbs |
| Top Speed |
139.0 km/h / 86.4 mph |
139.0 km/h / 86.4 mph |
139.0 km/h / 86.4 mph |
153.0 km/h / 95.1 mph |
- |
| Seat Height |
775 mm / 30.5 in. |
775 mm / 30.5 in |
775 mm / 30.5 in |
775 mm / 30.5 in. |
775 mm / 30.1 in |
| Fuel Capacity |
12.8 Litres / 3.4 US gal |
12.8 Litres / 3.4 US gal |
12.8 Litres / 3.4 US gal |
12.80 litres / 3.38 US gallons |
12.8 Litres / 3.4 US gal |
| Comments |
Windscreen. |
- |
Automatic Stability Control |
Automatic Stability Control |
- |
| Frame Type |
Tubular spaceframe |
Tubular spaceframe |
Steel tube construction with aluminum die cast unit |
Tubular steel with die-cast aluminum sections |
Steel bridge-type frame |
Key Specifications
Engine
Single cylinder, four-stroke
Power
25.3 kW / 34 hp @ 7500 rpm
Torque
34.3 Nm / 25.8 lb-ft @ 6000 rpm
Top Speed
139.0 km/h / 86.4 mph
Fuel Capacity
12.8 Litres / 3.4 US gal
Advertisement
Full 2020 BMW C 400X Specifications
Year
2020
Make
BMW
Model
C 400X
Colours
Alpine White, Zenith Blue Metallic, Black Storm Metallic
Make Model
BMW C 400X
Seat Height
775 mm / 30.5 in
Wheelbase
1564.5 mm / 61.6 in.
Height
1305 mm / 51.4 in.
Length
2210 mm / 87 in
Seat Height (Inner Leg Curve)
1760 mm / 69.3 in
Width
833 mm / 32.8 in
Dry Weight
193 kg / 425.5 lbs
Fuel Capacity
12.8 Litres / 3.4 US gal
Wet Weight
204 kg / 450 lbs
CO2
81.2 CO2 g/km. (CO2 - Carbon dioxide emission)
Engine Type
Single cylinder, four-stroke
Fuel Control
Overhead Cams (OHC)
Stroke
69.5 mm
Displacement
350 cc / 21.3 cu-in
Engine Detail
Four stroke, single cylinder, SOHC, 4 Valves, with rocker arm
Fuel System
Injection
Bore x Stroke
80 x 69.6 mm
Compression Ratio
11.5:1
Cooling System
Liquid cooled
Emissions
Closed-loop 3-way catalytic converter, emission standard EU-4
Engine Lubrication
Wet sump
Exhaust
Stainless Steel
Fuel Consumption
3.50 litres/100 km (28.6 km/l or 67.21 mpg)
Fuel Induction
Fuel injection, BMS-E2 40mm throttle valve diameter
Fuel Reserve
4.00 litres / 1.06 US gallons
Fuel Type
Regular lead free (95 RON)
Ignition
BMS-E2 digital engine management
Starter
Electric, 0.5 kW
Valve System
4
Battery Capacity
12/9 V/Ah
Clutch
Centrifugal clutch
Final Drive
Gear reduction cog wheel pairing
Gearbox
Automatic
Primary Drive
Chain drive in oil bath
Transmission / Drive
Continuously variable CVT belt transmission
Frame Type
Tubular spaceframe
Suspension - Front
35mm Telescopic forks.
Suspension - Rear
Aluminum double-sided swing arm, double spring strut, adjustable spring preload
Rake
26.4°
Trail
81.2 mm / 3.2 in
Wheel Travel - Front
110 mm / 4.3 in
Wheel Travel - Rear
112 mm / 4.4 in
Tachometer
Standard (Optional 6.5-inch TFT connectivity dashboard)
Alternator
316W
Lighting system
LED headlights
Brakes - Front
2x 265mm Rigid discs 4 piston caliper
Brakes - Rear
Single 265mm disc 1 piston caliper
ABS
BMW Motorrad ABS
Rims
Cast aluminum
Rims - Front
3.50 x 15
Rims - Rear
4.25 x 14
Tyres - Front
120/70 ZR15
Tyres - Rear
150/70 ZR14
Wheels
Die-cast aluminum wheels
Specifications are compiled from manufacturer documentation and cross-referenced
technical sources, and corrected on an ongoing basis.
Spot an error? Let us know.
Advertisement