BMW C 400 GT (K08) — OEM Fluid, Tire Pressure & Maintenance Specs
350cc Liquid-Cooled Single-Cylinder SOHC 4-Valve (Dry Centrifugal CVT) · Source: BMW Motorrad C 400 GT (K08) Official Rider’s Manual Technical Data
According to the BMW Motorrad C 400 GT (K08) Official Rider’s Manual Technical Data, the 2019–Present BMW C 400 GT (K08) (chassis K08/0C06/0C61/K09 (C 400 X)) requires 1.6 L (1.69 US qt) of SAE 5W-40 (JASO MA OR MB, API SJ / JASO MA2 (BMW Advantec Ultimate) or JASO MB) engine oil for a drain-only change and 1.8 L (1.90 US qt) with filter service (11427673541 / 11425B79146 (HF164)). Standard solo cold tire pressure is 220 kPa / 2.20 bar / 32 PSI front (120/70R15 M/C 56H) and 240 kPa / 2.40 bar / 35 PSI rear (150/70R14 M/C 66S), paired with 1× NGK LMAR8J-9E spark plug(s) and a YTX9-BS / BMW 12V 9Ah AGM battery.
Drain only: 1.6 L (1.69 US qt)
R 240 kPa (2.40 bar)
Est. Range: ~365 km (227 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Dry Centrifugal CVT Belt Drive |
|---|---|
| Recommended Viscosity & Grade | SAE 5W-40 (Alt: SAE 10W-40 (건식 CVT 구조상 JASO MB 저마찰 오일도 호환)) · JASO MA OR MB · API SJ / JASO MA2 (BMW Advantec Ultimate) or JASO MB |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 1.6 L (1.69 US qt) • With filter/strainer: 1.8 L (1.90 US qt) • Complete dry overhaul: 2 L (2.11 US qt) |
| OEM Oil Filter Code & Type | 11427673541 / 11425B79146 (HF164) |
| Correct Oil Level Check Method | Hold upright on level ground; rest dipstick UNTHREADED on filler neck (do NOT screw in) |
| Oil Drain Bolt Torque | 28 N·m (20.7 lb-ft / 2.86 kgf·m) — Use fresh crush washer |
| Final Drive / Bevel Gear Oil | 215 ml (0.21 L) — BMW Synthetik OSP SAE 75W-90 GL-5 (215 ml service / 240 ml dry) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 120/70R15 M/C 56H · Rear: 150/70R14 M/C 66S (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 220 kPa / 2.20 bar / 32 PSI Rear: 240 kPa / 2.40 bar / 35 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 240 kPa / 2.40 bar / 35 PSI Rear: 260 kPa / 2.60 bar / 38 PSI |
| OEM Spark Plug & Quantity | NGK LMAR8J-9E × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTX9-BS / BMW 12V 9Ah AGM (12V 9.0Ah MF AGM) |
| Final Drive Maintenance | BMW OEM CVT V-Belt (24828395830) — Replace belt & variator rollers every 20,000 km |
| Brake Fluid & Coolant | DOT 4 · BMW Motorrad Frostox HT-12 Antifreeze & Coolant (~1.2 L) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 350 cc · 34 hp @ 7,500 rpm · 35 N·m (25.8 lb-ft) @ 5,750 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 775 mm (30.5 in) · 214 kg (472 lbs) |
| Fuel Tank & Est. Real-World Range | 12.8 L (3.4 US gal) · ~28.5 km/L → ~365 km (227 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 10,000 km / 10,000 km • Air Filter / Spark Plug: 20,000 km / 20,000 km • Valve Clearance Check: 20,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Despite the 400 badge, both the C 400 GT (K08) and C 400 X (K09) share an identical 350cc single-cylinder engine. The 2021 Euro 5 update revised E-Gas throttle mapping and front brake calipers, while 2025+ Euro 5+ models added standard ABS Pro and lowered seat height from 775 mm to 765 mm.
Oil & Clutch Mechanical Engineering Note
Although its dry centrifugal CVT isolates the clutch from engine oil (allowing JASO MB low-friction 5W-40), BMW specifies Advantec Ultimate SAE 5W-40 (JASO MA2) across dealerships. Unlike small scooters with mesh screens only, the K08 uses a full spin-on cartridge filter (11427673541) for a 1.8 L service fill.
Garage Wrenching Gotchas
- Check engine oil on the centerstand at operating temperature with the dipstick resting on the filler threads (do NOT screw it in); MIN-to-MAX span is 0.4 L.
- Refill the rear spur-gear final drive using a graduated syringe to exact 215 ml of SAE 75W-90 GL-5 gear oil (240 ml dry)—overfilling blows out the rear axle seal.
5. Frequently Asked Questions (FAQ)
Do the BMW C 400 GT and C 400 X use the same oil capacity and oil filter?
Yes—both K08 (GT) and K09 (X) share the exact same 350cc powertrain, taking 1.8 L (1.9 US qt) of SAE 5W-40 oil with spin-on filter 11427673541 (HF164).
How much final drive gear oil does the BMW C 400 GT take?
A standard final drive gear oil drain-and-fill requires 215 ml of SAE 75W-90 GL-5 synthetic gear oil every 20,000 km (or every 10,000 km under heavy urban commuting).
What are the OEM tire sizes and cold tire pressures for the BMW C 400 GT?
Stock radial sizes are 120/70R15 front and 150/70R14 rear. Cold pressures are 220 kPa (32 PSI) front / 240 kPa (35 PSI) rear solo, rising to 240 kPa (35 PSI) front / 260 kPa (38 PSI) rear two-up.