BMW C 650 Sport (K18) — OEM Fluid, Tire Pressure & Maintenance Specs
647cc Liquid-Cooled Parallel-Twin DOHC 8-Valve Dry-Sump (CVT) · Source: BMW C 650 Sport (K18) (2016–2020) Official Owner’s Manual Maintenance Specifications
According to the BMW C 650 Sport (K18) (2016–2020) Official Owner’s Manual Maintenance Specifications, the 2016–2020 BMW C 650 Sport (K18) (chassis K18/0C04) requires 2.9 L (3.06 US qt) of SAE 15W-50 (JASO MA2, API SJ / JASO MA2) engine oil for a drain-only change and 3.1 L (3.28 US qt) with filter service (11427673541 / HF164). Standard solo cold tire pressure is 250 kPa / 2.50 bar / 36 PSI front (120/70 ZR15) and 290 kPa / 2.90 bar / 42 PSI rear (160/60 ZR15), paired with 2× NGK LMAR8D-J spark plug(s) and a YTZ14S / YTX14-BS battery.
Drain only: 2.9 L (3.06 US qt)
R 290 kPa (2.90 bar)
Est. Range: ~338 km (210 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Dry Centrifugal CVT Belt Drive |
|---|---|
| Recommended Viscosity & Grade | SAE 15W-50 · JASO MA2 · API SJ / JASO MA2 |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 2.9 L (3.06 US qt) • With filter/strainer: 3.1 L (3.28 US qt) • Complete dry overhaul: 3.5 L (3.70 US qt) |
| OEM Oil Filter Code & Type | 11427673541 / HF164 |
| Correct Oil Level Check Method | Dry-sump oil tank — warm engine to operating temperature and check oil tank/frame dipstick immediately after shutdown per OEM procedure (never top up cold) |
| Oil Drain Bolt Torque | 28 N·m (20.7 lb-ft / 2.86 kgf·m) — Use fresh crush washer |
| Final Drive / Bevel Gear Oil | 750 ml (0.75 L) — SAE 75W-90 GL-5 (750 ml enclosed oil-bath chaincase!) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 120/70 ZR15 · Rear: 160/60 ZR15 (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 250 kPa / 2.50 bar / 36 PSI Rear: 290 kPa / 2.90 bar / 42 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 250 kPa / 2.50 bar / 36 PSI Rear: 290 kPa / 2.90 bar / 42 PSI |
| OEM Spark Plug & Quantity | NGK LMAR8D-J × 2 (Gap: 0.8 mm) |
| OEM Battery Code & Rating | YTZ14S / YTX14-BS (12V 12.0Ah MF AGM) |
| Final Drive Maintenance | Enclosed Oil-Bath Final Chaincase (750 ml SAE 75W-90 gear oil) |
| Brake Fluid & Coolant | DOT 4 · OAT ethylene-glycol coolant for aluminum radiators (50:50 premix) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 647 cc · 60 hp @ 7,500 rpm · 63 N·m (46.5 lb-ft) @ 6,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 800 mm (31.5 in) · 249 kg (549 lbs) |
| Fuel Tank & Est. Real-World Range | 15.5 L (4.1 US gal) · ~21.8 km/L → ~338 km (210 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 / 40,000 km • Valve Clearance Check: 40,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Succeeded the C 600 Sport in 2016 with sharper K18 bodywork, twin-pipe exhaust, standard ASC traction control, and the expandable parked Flexcase helmet bay.
Oil & Clutch Mechanical Engineering Note
Its dry-sump twin crankcase requires opening two bottom drain plugs for complete oil evacuation before refilling 3.1 L of SAE 15W-50 with spin-on filter 11427673541.
Garage Wrenching Gotchas
- Instead of external chain spray, the enclosed final chain runs in 750 ml of SAE 75W-90 oil and uses an eccentric housing adjuster serviced every 20,000 km.
- Always warm the engine to operating temperature and check the dry-sump tank dipstick on the centerstand immediately after shutdown to avoid overfilling.
5. Frequently Asked Questions (FAQ)
What are the engine oil and rear hub gear oil capacities for the BMW C 650 Sport (K18) scooter?
With an isolated dry CVT belt case, the engine requires 2.9 L drain-only or 3.1 L (3.28 US qt) with filter/screen (11427673541 / HF164) of SAE 15W-50 (JASO MA2). Service the rear reduction hub separately (final drive 750 ml).
How do you accurately check the oil level on the C 650 Sport (K18), and what are its service intervals?
Because this dry-sump engine scavenges oil into a separate tank while running, always measure immediately after a full warm-up; checking stone-cold after sitting misleads riders into massive overfilling. Torque the drain plug to 28 N·m with a new crush washer. Factory oil change intervals are every 10,000 km, with valve clearance inspection every 40,000 km.
What are the cold tire pressures, puncture repair type, seat height, and range of the C 650 Sport (K18)?
Fitted with 120/70 ZR15 front and 160/60 ZR15 rear tubeless rims (compatible with roadside plug kits), set cold tire pressures to 36 / 42 PSI (250/290 kPa) solo or 36 / 42 PSI loaded. Seat height is 800 mm (31.5 in) at 249 kg wet weight, delivering ~338 km per 15.5 L tank.