Engine Mechanical:
Full engine disassembly, assembly, inspection, and repair of the boxer-twin engine, including cylinder heads, pistons, connecting rods, crankshaft, valves, camshafts, timing chain/gears.
Fuel System:
Fuel injection system (Bosch Motronic variants), fuel pump, injectors, throttle bodies, fuel lines, fuel tank, pressure regulator.
Exhaust System:
Catalytic converter, mufflers, exhaust pipes, lambda sensors (O2 sensors).
Transmission Gearbox:
Clutch operation, gearbox disassembly, assembly, inspection, gear selection, shift mechanism.
Drivetrain:
Single-plate dry clutch, driveshaft, universal joints, final drive housing, bevel gear, bearings.
Suspension Front:
Telelever front suspension system: forks, shock absorber, linkages, bearings, seals, fluid changes.
Suspension Rear:
Paralever rear suspension system: swingarm, shock absorber, linkages, bearings, seals, adjustment.
Brakes Front:
Dual disc brakes: calipers, master cylinders, brake lines, pads, rotors, ABS (optional), bleeding procedures.
Electrical System:
Wiring diagrams, battery, alternator, starter motor, fuses, relays, lighting system, horn, starter interlock.
Instrumentation Controls:
Dashboard, indicators, switches, handlebar controls, diagnostic connector.
Bodywork Chassis:
Frame inspection, fairings, seats, fuel tank removal, fenders, body panel repair and replacement.
Ignition:
Ignition coils, spark plugs, ECU control, timing.
Brakes Rear:
Single disc brake: caliper, master cylinder, brake lines, pads, rotor, ABS (optional), bleeding procedures.
Maintenance:
Oil and filter changes, spark plug replacement, air filter service, brake pad replacement, fluid flushes (brake, clutch, final drive), valve clearance adjustment, tire pressure checks, lubrication points.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon issues, fault code interpretation (if applicable), electrical system diagnostics.
Repair Rebuild:
Detailed step-by-step instructions for engine rebuilds, transmission overhauls, suspension component replacement, brake system overhauls, electrical component repairs.
Adjustments:
Carburetor synchronization (if applicable, though R1150 is fuel injected), idle speed adjustment, clutch adjustment, throttle cable adjustment, suspension sag adjustment.
Disassembly Assembly:
Complete guides for removing and reinstalling all major and minor components of the motorcycle.
Depth:
In-depth technical coverage suitable for professional mechanics and experienced DIY enthusiasts. Includes torque specifications, clearances, material tolerances, diagnostic procedures, and specialized tool recommendations.
Engine Type:
Air/oil-cooled, four-stroke, flat twin (boxer) engine.
Displacement:
1130cc (1130 cm³)
Bore X Stroke:
101 mm x 70.5 mm
Compression Ratio:
10.0:1 (typical)
Valve Train:
SOHC, 4 valves per cylinder, actuated by pushrods and rocker arms.
Horsepower:
Approx. 95 hp (70 kW) @ 7250 rpm (varies slightly by model variant and region).
Torque:
Approx. 97 Nm (71.5 lb-ft) @ 5750 rpm (varies slightly).
Fuel Delivery:
Electronic Fuel Injection (EFI) with Bosch Motronic engine management.
Fuel Type:
Unleaded gasoline, 95 RON recommended.
Oil Type:
BMW Motorrad recommends specific mineral or synthetic motorcycle oil meeting API SG or higher, and JASO MA standards. Typical viscosity: 20W-40 or 15W-50.
Oil Capacity W Filter:
Approx. 4.0 liters (4.2 US qt)
Ignition System Type:
Distributorless ignition (2 ignition coils).
Length:
Varies by model (e.g., R1150RT approx. 2230 mm).
Width:
Varies by model (e.g., R1150RT approx. 920 mm at handlebars).
Height:
Varies by model (e.g., R1150RT approx. 1435 mm seat height).
Dry Weight:
Varies by model (e.g., R1150GS approx. 216 kg, R1150RT approx. 259 kg).
Gross Vehicle Weight Rating:
Typically around 470-500 kg depending on model.
Fuel Tank Capacity:
Approx. 20-25 liters (5.3-6.6 US gal), depending on model (e.g., R1150GS: 20L, R1150RT: 25L).
Oil Change Interval:
Typically every 10,000 km (6,000 miles) or annually, whichever comes first.
Valve Adjustment Interval:
Recommended every 20,000 km (12,000 miles).
Final Drive Oil Change:
Recommended every 20,000 km (12,000 miles) or as per manual.
Brake Fluid Type:
DOT 4 brake fluid.
Clutch Fluid Type:
DOT 4 brake fluid (if hydraulic clutch system).
Coolant Type:
Not applicable for most R1150 models which are air/oil cooled, except for the cylinder head oil cooling circuits.
Common Issues General:
While generally robust, common areas of attention can include ABS modulator issues, fuel pump longevity, worn clutch slave cylinder seals, and occasional electrical connector corrosion, especially on bikes used in harsh environments.
Transmission Issues:
Input shaft splines on the gearbox can wear over time, requiring lubrication or replacement. Bevel drive splines can also require periodic inspection and lubrication.
Suspension Issues:
Seals in the Telelever and Paralever linkages can wear, leading to play and requiring service. Shock absorbers have a finite lifespan.