11 11.5 Technical Data R 1150 GS Engine, general Engine design Four-stroke flat twin, air-cooled with oil- cooled exhaust ports, installed longitudinally, 4 valves per cylinder, two overhead camshafts, electronic fuel injection. Location of engine number Crankcase Cylinder bore mm (in) 101 (3.97) Stroke mm (in) 70.5 (2.78) Effective displacement cc 1,130 Compression ratio 10.3 : 1 Power output kW/(bhp)/rpm 62.5/(85)/6,750 Max. torque Nm/rpm 98/5,250 Permissible maximum engine speed rpm 7,900 Idle speed rpm 1,100+50 Direction of rotation Clockwise, looking at ignition system Compression test pressure good bar (psi) normal bar (psi) poor bar (psi) above 10 (142) 8.5 ... 10 (121 ...
142) below 8.5 (121) Intake port dia./cylinder head mm (in) 44 (1.7) Lubrication system Theoretical volume in circulation at 6,000 rpm Lubricating oil l (Imp.gal/ US gal) Cooling oil l (Imp.gal/ US gal) 30 (6.6/7.9) 33 (7.3/8.7) Oil filter Full-flow type Pressure differential needed to open bypass valve bar (psi) 1.5 (21.3) Oil pressure warning light comes on below bar (psi) 0.3 (4.2) Pressure relief valve opens at bar (psi) 5.5 (78.3) Operating pressure bar (psi) 3.5 ... 6.0 (49.8 ...
85.4) Oil content without filter change l (Imp.pint/ US quart) with filter change l (Imp.pint/ US quart) min/max l (Imp.pint/ US quart) 3.50 (6.16/3.70) 3.75 (6.60/3.96) 0.5 (0.88/0.53) Permissible oil consumption I/1,000 km (miles per Imp.pint/miles per US quart) 1.0 (350/390) Oil pump Oil capacity 2 Duocentric pumps Housing depth Cooling oil mm (in) Lube oil mm (in) Height of rotor Cooling oil mm (in) Lube oil mm (in) Axial play mm (in) Wear limit mm (in) 11.02 ... 11.05 (0.434 ... 0.435) 10.02 ... 10.05 (0.394 ... 0.396) 10.965 ... 10.98 (0.431 ... 0.432) 9.965 ... 9.98 (0.392 ... 0.393) 0.04 ... 0.085 (0.002 ... 0.003) 0.25 (0.010)