Model Segment:
Sport-touring / Roadster motorcycle.
Key Competitors:
Honda VFR, Yamaha FJ1200, Kawasaki GTR1000, Moto Guzzi California.
Engine Layout:
BMW's signature Boxer twin engine, known for its low center of gravity and smooth power delivery.
Suspension Technology:
Innovative Telelever front suspension for superior ride quality and handling, Monolever rear drive.
Braking System:
Advanced ABS braking systems (ABS II and Integral ABS) offering enhanced safety.
Build Quality:
Reputation for robust construction and German engineering.
Engine:
Detailed coverage of the BMW Boxer twin-cylinder, four-stroke, air/oil-cooled engine.
Fuel System:
Fuel injection system (Bosch Motronic), fuel pump, injectors, throttle body, fuel lines, and tank.
Ignition System:
Electronic ignition system, coils, spark plugs, and control unit.
Transmission:
Clutch, gearbox (5-speed), final drive, and associated components.
Chassis Frame:
Frame construction, subframe, and related hardware.
Suspension:
Front Telelever suspension, rear Monolever swingarm, shock absorber, and forks.
Brakes:
ABS II (or optional integral ABS), front and rear brake discs, calipers, master cylinders, brake lines, and fluid.
Electrical System:
Battery, alternator, starter motor, lighting system (headlight, taillight, turn signals), wiring diagrams, fuses, relays, and control modules.
Bodywork:
Fairings, fuel tank, seat, fenders, and other body panels.
Wheels Tires:
Wheel specifications, tire sizing, and mounting procedures.
Preventative Maintenance:
Oil changes, filter replacements, spark plug checks, valve adjustments, brake fluid flushes, and lubrication schedules.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon issues, error code interpretation (if applicable).
Engine Repair:
Top-end rebuilds (cylinder head, valves), bottom-end (crankshaft, connecting rods), oil pump, and cooling system.
Transmission Repair:
Clutch replacement, gearbox disassembly and reassembly, final drive service.
Suspension And Steering Service:
Fork seal replacement, shock absorber overhaul, Telelever and Monolever linkage service.
Brake System Overhaul:
Bleeding procedures, caliper rebuilding, master cylinder replacement, ABS system diagnostics.
Electrical Diagnostics:
Wiring harness inspection, component testing, charging system analysis, and troubleshooting lighting issues.
Bodywork And Fairing Repair:
Panel removal and installation, mounting hardware, and cosmetic repairs.
Depth Of Coverage:
Comprehensive from basic maintenance to complete engine and transmission rebuilds.
Diagnostic Information:
Detailed troubleshooting guides, expected specifications, and common failure points.
Torque Specifications:
Extensive list of torque values for all critical fasteners.
Wiring Diagrams:
Complete and detailed electrical schematics for all systems.
Engine Type:
Air/oil-cooled, four-stroke, flat twin (Boxer) engine.
Displacement R1100:
1085 cc
Displacement R850:
848 cc
Bore X Stroke R1100:
99 mm x 70.5 mm
Bore X Stroke R850:
85 mm x 73 mm
Compression Ratio R1100:
10.7:1
Compression Ratio R850:
10.0:1
Valve Train:
2 valves per cylinder, pushrod operated, overhead camshafts (OHV with pushrods).
Horsepower R1100:
Approx. 90 HP @ 6750 rpm
Horsepower R850:
Approx. 70 HP @ 7500 rpm
Torque R1100:
Approx. 98 Nm (72 lb-ft) @ 5250 rpm
Torque R850:
Approx. 77 Nm (57 lb-ft) @ 5000 rpm
Fuel Delivery:
Electronic fuel injection (Bosch Motronic 2.2 or similar).
Fuel Type:
Unleaded gasoline, minimum 91 octane (RON+MON)/2.
Fuel Capacity:
Approx. 25 Liters (6.6 US gallons)
Oil Change Interval:
Every 10,000 km (6,000 miles) or annually, whichever comes first.
Oil Filter Replacement:
With every oil change.
Air Filter Inspection:
Every 10,000 km (6,000 miles); replace as needed.
Spark Plug Replacement:
Every 20,000 km (12,000 miles).
Valve Adjustment Interval:
Every 20,000 km (12,000 miles).
Brake Fluid Flush:
Every 2 years.
Engine Oil Type:
SAE 15W-40 or 15W-50 API SG or higher (e.g., Castrol Power 1 4T).
Engine Oil Capacity:
Approx. 4 Liters (4.2 US quarts) with filter change.
Coolant Type:
BMW Premium Coolant (50/50 mix with distilled water) for oil cooler circuit if applicable, otherwise no coolant needed for main engine.
Common Problems Potential:
Stretched timing chain guides, occasional ABS sensor failures, fuel pump issues, worn clutch plates, Telelever pivot wear.
Maintenance Considerations:
Regular valve clearance checks are crucial for engine health. Thorough inspection of the Telelever and Monolever linkage points for wear is recommended.
Bmw Motorcycle Legacy:
BMW has a long and storied history in motorcycle manufacturing, dating back to 1923, renowned for engineering innovation and durability.
R1100 R Introduction:
The R1100 R was introduced in 1994 as a naked roadster variant of the R1100 GS and R1100 RT, emphasizing sportier ergonomics and styling.
R850 R Introduction:
The R850 R was introduced as a more accessible, slightly detuned version of the R1100 R, often with a lower seat height and slightly different power output.
Engine Platform:
These models utilized the new 1100cc (and 850cc) Boxer engine platform which saw BMW move from older airhead designs to a more modern oil-cooled configuration with fuel injection.
Manufacturing Location:
Berlin, Germany (BMW Motorrad Plant).
