| Component | Specification |
|---|---|
| Model Code | 0S01 (2018 – Present) |
| Engine Oil | SAE 5W-40, API SJ / JASO MA2 (1.5 L) |
| Spark Plug | NGK LMAR8J-9E |
| Battery | YTX9-BS (12V) |
| Front Tire | 120/70 R15 (2.2 bar / 32 psi) |
| Rear Tire | 150/70 R14 (2.5 – 2.9 bar / 36 – 42 psi) |
The BMW C 400 GT (0S01) introduced a significant engineering milestone for the Bavarian manufacturer: the implementation of a vibration-decoupled swingarm. Unlike traditional scooter designs where engine vibrations are transmitted directly through the chassis, the 0S01 utilizes a unique swingarm bearing system and specialized rubber mountings that effectively isolate the rider from the high-frequency oscillations inherent in mid-sized single-cylinder engines.
Technical Review: Mid-Size Powerhouse
The 0S01 is powered by a liquid-cooled 350cc single-cylinder engine paired with a Continuously Variable Transmission (CVT). From a technical standpoint, the integration of Automatic Stability Control (ASC) as standard equipment highlights BMW’s commitment to safety in the urban mobility sector. The braking system, featuring twin front discs with radial-mount four-piston calipers, provides deceleration performance more commonly found on middleweight sport-touring motorcycles than on scooters.
Maintenance Guide & Fluid Specifications
1. Lubrication System
For the longevity of the 350cc powerplant, BMW specifies SAE 5W-40 synthetic oil. The system capacity is relatively compact at 1.5 Liters. It is imperative to use oil meeting the JASO MA2 standard to ensure the internal components and seals are properly protected under high-thermal loads typical of stop-and-go city traffic.
2. Ignition & Electrical
The ignition system relies on the NGK LMAR8J-9E spark plug. Given the high compression ratio of the engine, maintaining a clean electrode is vital for cold-start reliability. The electrical system is anchored by a YTX9-BS battery; owners should ensure the terminals remain free of oxidation, especially if the scooter is equipped with the optional Keyless Ride system which places a constant, albeit small, parasitic draw on the battery.
3. Chassis and Tires
The C 400 GT utilizes a staggered wheel setup (15-inch front, 14-inch rear) to balance agility with stability. Maintenance of tire pressure is critical for the 0S01’s handling characteristics:
- Front (120/70 R15): 2.2 bar (32 psi)
- Rear (150/70 R14): 2.5 bar (36 psi) for solo riding, increasing to 2.9 bar (42 psi) when carrying a pillion or heavy luggage.
Summary of Service Intervals
Regular inspection of the CVT belt and the variator weights is recommended every 10,000 km. While the 0S01 is engineered for durability, the high-stress environment of urban commuting necessitates strict adherence to the 1.5L oil change interval to prevent premature wear of the overhead camshafts.