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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 6.3 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 C 400X - Pros & Cons
Strengths
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⚡
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.
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🔧
Fuel injection: Fuel injection means consistent cold starts and clean throttle response without the fussiness of a carbureted setup.
Considerations
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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, cover the fundamentals: service book and oil change history, chain and sprocket wear, and any sign of oil weeping around the casings. 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 a C 400X's engine like disciplined oil changes - stay on the manufacturer's schedule (roughly every 6,000 km or annually). 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 |
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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 |
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| 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
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Full 2020 BMW C 400X Specifications
Year
2020
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
Fuel Control
Overhead Cams (OHC)
Engine Type
Single cylinder, four-stroke
CO2
81.2 CO2 g/km. (CO2 - Carbon dioxide emission)
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, 500 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
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.
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