BMW R 1300 GS Adventure (KA2 & ASA) OEM Spec Brief — Fluid, Adaptive Ride Height & Weight Delta vs R 1250 GSA
Side-by-side OEM engineering comparison between the 1,300cc under-engine-gearbox BMW R 1300 GS Adventure (with optional Automated Shift Assistant) and the K51 R 1250 GS Adventure.
Outgoing vs New OEM Specification & Fluid Delta Matrix
| Specification | Outgoing Generation | Confirmed 2025 Spec |
|---|---|---|
| Displacement / Power / Torque | 1,254 cc ShiftCam · 136 hp / 143 N·m | 1,300 cc ShiftCam (Under-engine gearbox) · 145 hp / 149 N·m |
| Fuel Tank / Wet Weight (DIN) | 30.0 L (7.9 gal) / 268 kg (591 lbs) | 30.0 L aluminum tank / 269 kg (593 lbs) |
| Seat Height (Adaptive Height Control) | 890 / 910 mm standard dual-position | 870–890 mm riding ↔ auto-lowers 30 mm at stops (840–860 mm) |
| Engine Oil Spec (Manual & ASA) | SAE 5W-40 API SL / JASO MA2 · 4.0 L w/ filter | SAE 5W-40 API SL / JASO MA2 · Shared wet-clutch sump |
| Final Drive Oil & Cold Tire PSI | Hypoid G3 180 ml · F 250 / R 290 kPa (36 / 42 PSI) | Hypoid Axle Oil G3 (70W-80) 180 ml · F 250 / R 290 kPa (36 / 42 PSI) |
1. Does ASA Change Engine Oil or Wet-Clutch Maintenance?
Unlike dual-clutch systems that add a secondary hydraulic clutch oil filter, BMW’s Automated Shift Assistant (ASA) actuates the standard wet anti-hopping clutch and under-engine 6-speed gearbox via two electromechanical actuators. Crankcase oil specification remains SAE 5W-40 API SL / JASO MA2 across both manual and ASA bikes.
2. Adaptive Vehicle Height Control & Non-Interchangeable K51 Hardware
Adaptive Vehicle Height Control automatically lowers ride height by 30 mm at low speed and standstill (870 mm down to 840 mm) while easing center-stand effort. Because the KA2 switches to a sheet-metal main frame and bolt-on aluminum lattice subframe, K51 pannier racks and crash bars do not fit.
Linked OEM Spec Sheets & Primary Source
New Model Maintenance & Fitment FAQ
Does the R 1300 GS Adventure with ASA require separate gearbox oil or a second clutch filter?
No. The under-engine 6-speed gearbox and wet clutch share the main SAE 5W-40 JASO MA2 engine sump; only the rear shaft final drive uses a separate 180 ml fill of BMW Hypoid Axle Oil G3.
Do R 1250 GS Adventure aluminum panniers bolt straight onto the R 1300 GS Adventure?
Not on OEM racks. The KA2 R 1300 GS Adventure introduces new aluminum pannier mounts featuring integrated electrical pass-throughs and magnetic coupling.
Do BMW cold tire pressures change between solo and two-up loaded touring on the R 1300 GSA?
BMW specifies the same cold pressure for both solo and fully loaded two-up riding: 250 kPa (2.5 bar / 36 PSI) front and 290 kPa (2.9 bar / 42 PSI) rear.