BMW R 1250 GS Adventure (K51) — OEM Fluid, Tire Pressure & Maintenance Specs
1,254cc Air/Liquid-Cooled Flat-Twin Boxer BMW ShiftCam Variable Valve Timing · Source: BMW Motorrad R 1250 GS Adventure (K51 / 0J51) Official Rider’s Manual
According to the BMW Motorrad R 1250 GS Adventure (K51 / 0J51) Official Rider’s Manual, the 2019–2024 BMW R 1250 GS Adventure (K51) (chassis K51 (GSA)/0J51/K50 (R 1250 GS)) requires 3.7 L (3.91 US qt) of SAE 5W-40 (JASO MA2, API SL or higher (BMW Advantec Ultimate 5W-40 — No Moly)) engine oil for a drain-only change and 4 L (4.23 US qt) with filter service (11427721779 (Mahle OC 619 / HF160)). Standard solo cold tire pressure is 250 kPa / 2.50 bar / 36 PSI front (120/70R19 M/C 60V) and 290 kPa / 2.90 bar / 42 PSI rear (170/60R17 M/C 72V), paired with 2× NGK LMAR8AI-10 spark plug(s) and a YTX14-BS / BMW 12V 14Ah AGM battery.
Drain only: 3.7 L (3.91 US qt)
R 290 kPa (2.90 bar)
Est. Range: ~630 km (391 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Multi-Plate Manual Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 5W-40 (Alt: SAE 15W-50 (일부 딜러 혹서기 대체유 — 시프트캠 유압 반응성은 5W-40 순정 권장)) · JASO MA2 · API SL or higher (BMW Advantec Ultimate 5W-40 — No Moly) |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 3.7 L (3.91 US qt) • With filter/strainer: 4 L (4.23 US qt) • Complete dry overhaul: 4.4 L (4.65 US qt) |
| OEM Oil Filter Code & Type | 11427721779 (Mahle OC 619 / HF160) |
| Correct Oil Level Check Method | Hold bike upright on level ground 3–5 min after warm shutdown; read crankcase sight glass |
| Oil Drain Bolt Torque | 42 N·m (31.0 lb-ft / 4.28 kgf·m) — Use fresh crush washer |
| Final Drive / Bevel Gear Oil | 180 ml (0.18 L) — Hypoid Axle Oil G3 SAE 75W-90 / 70W-80 (180 ml exact — NEVER 200+ ml) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 120/70R19 M/C 60V · Rear: 170/60R17 M/C 72V (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 LMAR8AI-10 × 2 (Gap: 0.8–1.0 mm) |
| OEM Battery Code & Rating | YTX14-BS / BMW 12V 14Ah AGM (12V 14.0Ah MF AGM) |
| Final Drive Maintenance | EVO Paralever Shaft Drive — 180 ml Hypoid G3 every 20,000 km + spline grease & moisture check |
| Brake Fluid & Coolant | DOT 4 · BMW Motorrad Frostox HT-12 Antifreeze (~1.6 L) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 1254 cc · 136 hp @ 7,750 rpm · 143 N·m (105.5 lb-ft) @ 6,250 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 890 mm (35.0 in) · 268 kg (591 lbs) |
| Fuel Tank & Est. Real-World Range | 30 L (7.9 US gal) · ~21 km/L → ~630 km (391 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
The iconic 30-liter aluminum-tank R 1250 GSA (K51) shares identical mechanical, oil (4.0 L), filter (11427721779), and tire specs with the standard 20 L R 1250 GS (K50). Do NOT confuse its 4.0 L sump and 11427721779 filter with the redesigned R 1300 GS (5.0 L, 11425B70298).
Oil & Clutch Mechanical Engineering Note
The wet-clutch ShiftCam boxer shares a 4.0 L max sump across engine and gearbox. Because ~0.2 L clings inside oil passages during a drain, pour 3.7–3.8 L initially, ride to full operating temperature, wait 5 minutes on the centerstand, and top up cleanly in the sight glass.
Garage Wrenching Gotchas
- Final drive bevel gear capacity is strictly 180 ml of Hypoid Axle Oil G3 (reduced from legacy >200 ml specs to prevent seal blow-out). Verify your K50/K51 has completed BMW’s swingarm rubber-valve drainage & driveshaft inspection campaign.
- Remove the aluminum bash plate to access the M20 drain plug (42 N·m) and left-side spin-on filter (
11427721779), and check 2019–2020 US/KR units for the front brake caliper seal recall.
5. Frequently Asked Questions (FAQ)
How much engine oil and final drive shaft oil does the R 1250 GS Adventure take?
Engine oil with filter (11427721779) is max 4.0 L (pour ~3.8 L first, then sight-glass check) of SAE 5W-40 JASO MA2, and rear bevel-gear final drive oil is 180 ml of Hypoid Axle Oil G3.
What is the real-world fuel range and cold tire pressure on the 30L R 1250 GSA?
With its 30.0 L (7.9 US gal) tank, real-world touring range easily reaches 550–620 km. BMW specifies a unified cold pressure of 250 kPa (36 PSI) front / 290 kPa (42 PSI) rear solo or loaded.
What is the seat height difference between standard and factory-lowered R 1250 GSA?
Standard GSA suspension sits at 890 / 910 mm, whereas the popular factory Low Suspension option drops seat height by 50 mm to 840 / 860 mm.