BMW G 650 Xchallenge (K15) — OEM Fluid, Tire Pressure & Maintenance Specs
652cc Liquid-Cooled Single DOHC 4-Valve Lightweight Rotax · Source: BMW G 650 Xchallenge (K15) (2007–2009) Official Owner’s Manual Maintenance Specifications
According to the BMW G 650 Xchallenge (K15) (2007–2009) Official Owner’s Manual Maintenance Specifications, the 2007–2009 BMW G 650 Xchallenge (K15) (chassis K15/0165) requires 2.1 L (2.22 US qt) of SAE 15W-50 (JASO MA2, API SJ / BMW Advantec Pro 15W-50) engine oil for a drain-only change and 2.3 L (2.43 US qt) with filter service (11412343118 / HF151). Standard solo cold tire pressure is 180 kPa / 1.80 bar / 26 PSI front (90/90-21) and 180 kPa / 1.80 bar / 26 PSI rear (140/80-18), paired with 1× NGK LMAR9D-J spark plug(s) and a YTX9-BS battery.
Drain only: 2.1 L (2.22 US qt)
R 180 kPa (1.80 bar)
Est. Range: ~238 km (148 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Multi-Plate Manual Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 15W-50 · JASO MA2 · API SJ / BMW Advantec Pro 15W-50 |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 2.1 L (2.22 US qt) • With filter/strainer: 2.3 L (2.43 US qt) • Complete dry overhaul: 2.6 L (2.75 US qt) |
| OEM Oil Filter Code & Type | 11412343118 / HF151 |
| 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 | 40 N·m (29.5 lb-ft / 4.08 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 90/90-21 · Rear: 140/80-18 (Tube-Type Spoke Rim) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 180 kPa / 1.80 bar / 26 PSI Rear: 180 kPa / 1.80 bar / 26 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 200 kPa / 2.00 bar / 29 PSI Rear: 220 kPa / 2.20 bar / 32 PSI |
| OEM Spark Plug & Quantity | NGK LMAR9D-J × 1 (Gap: 0.8 mm) |
| OEM Battery Code & Rating | YTX9-BS (12V 8.0Ah MF AGM) |
| Final Drive Maintenance | 520 Sealed X-Ring Chain — Maintain 25–35 mm slack and clean/lubricate regularly |
| 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 | 652 cc · 53 hp @ 7,000 rpm · 60 N·m (44.3 lb-ft) @ 5,250 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 930 mm (36.6 in) · 156 kg (344 lbs) |
| Fuel Tank & Est. Real-World Range | 9.5 L (2.5 US gal) · ~25 km/L → ~238 km (148 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 10,000 km / 10,000 km • Air Filter / Spark Plug: 10,000 km / 20,000 km • Valve Clearance Check: 20,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Cult 156 kg lightweight dual-sport pairing the 53 hp Rotax 652cc dry-sump single with 270 mm forks and a factory Continental pneumatic rear air shock.
Oil & Clutch Mechanical Engineering Note
BMW reverse-inclined 313cc single (G 310 R / GS) taking 1.65 L of SAE 15W-50 JASO MA2 with spin-on filter HF160.