Models Covered:
R1100 RT, R1100 RS, R850 GS, R1100 GS, R850 R, R1100 R
Engine Architecture:
Two-cylinder boxer engine, four-stroke
Engine Codes:
R259 (for R1100 models), R259A (for R850/1100 GS/R variants)
Segment:
Premium touring and sport-touring motorcycles
Target Audience:
BMW enthusiasts, owners, and independent motorcycle repair shops
Key Competitors:
Honda ST1100, Yamaha FJ1200, Kawasaki GTR1000, Moto Guzzi Norge
Engine Type:
Distinctive boxer-twin engine known for torque and character
Suspension Tech:
Innovative Telelever front suspension and Monolever rear for excellent ride quality and handling
Model Versatility:
Range of models catering to touring (RT), sport-touring (RS), and adventure/standard (GS/R) riders
Primary Coverage:
Comprehensive workshop repair and service information
Secondary Coverage:
Maintenance, troubleshooting, diagnostics, and component-level repair
Estimated Page Count:
300-500+ (estimated based on typical workshop manuals for multiple models)
Type:
Workshop Repair Service Manual
Language:
English (primary, implied by context)
Format:
Digital Download (PDF)
Engine:
Engine overhaul, cylinder head, valve train, fuel injection, ignition system, lubrication, cooling system
Transmission Drivetrain:
Gearbox disassembly and assembly, clutch, final drive, driveshaft, rear wheel hub
Chassis Suspension:
Front Telelever suspension, rear Monolever swingarm, shock absorbers, springs, wheel bearings
Brakes:
ABS system (if equipped), brake calipers, master cylinders, brake lines, fluid changes, rotor replacement
Electrical:
Wiring diagrams, battery, starter motor, alternator, lighting, instrumentation, ECU, sensors
Fuel System:
Fuel tank, fuel pump, fuel injectors, fuel pressure regulator, fuel filter
Exhaust System:
Exhaust manifold, catalytic converter, mufflers, lambda sensors
Bodywork Fittings:
Fairings, seats, luggage systems, body panels, handlebars, controls
Preventative Maintenance:
Oil changes, filter replacements, spark plug inspection/replacement, chain/driveshaft lubrication, brake fluid flush, coolant service
Troubleshooting:
Diagnostic flowcharts, common fault finding, electrical system diagnostics, engine performance issues
Repair Overhaul:
Detailed step-by-step instructions for engine rebuilds, transmission repair, suspension component replacement, electrical component repair
Adjustments:
Valve clearance adjustment, throttle cable adjustment, idle speed setting, clutch adjustment
Diagnostics Tools:
Information on specialized BMW diagnostic tools and procedures (e.g., connecting to diagnostic port)
Depth:
In-depth coverage suitable for professional technicians and experienced DIY mechanics
Detail Level:
Component-level detail, torque specifications, special tool requirements, clear diagnostic steps
Type:
Air/oil-cooled, four-stroke, two-cylinder boxer engine
Displacement:
1085 cc (for R1100 models); 848 cc (for R850 models)
Bore X Stroke:
99 mm x 70.5 mm (R1100); 87.5 mm x 70.5 mm (R850)
Compression Ratio:
10.7:1 (R1100); 10.3:1 (R850)
Horsepower R1100:
Approx. 90 hp @ 6,750 rpm
Torque R1100:
Approx. 98 Nm (72 lb-ft) @ 5,250 rpm
Horsepower R850:
Approx. 70 hp @ 7,500 rpm
Torque R850:
Approx. 77 Nm (57 lb-ft) @ 5,000 rpm
Injection System:
Bosch Motronic MA 2.4 or similar fuel injection system
Fuel Type:
Unleaded gasoline, minimum 91 octane (RON+MON)/2
Actuation:
Two valves per cylinder, operated by pushrods and rocker arms
Instrument Cluster:
Analog tachometer and speedometer, multi-function LCD display (fuel level, gear indicator, clock, ambient temperature, etc.)
Audio System:
Optional integrated radio and cassette player on some RT models
ABS System:
BMW Motorrad ABS II or Integral ABS (optional, depending on year and model)
Diagnostic Port:
On-board diagnostics port for connection to BMW diagnostic tools
Oil Change Interval:
Every 10,000 km or annually (refer to manual for precise interval and oil type)
Valve Adjustment Interval:
Every 20,000 km or as recommended in the manual
Spark Plug Replacement:
Check every 20,000 km, replace as needed
Engine Oil:
SAE 20W-50 API SG or higher (check manual for specific recommendations, often BMW ADVANTEC or equivalent)
Brake Fluid:
DOT 4 (for ABS II and Integral ABS systems)
Coolant:
BMW Motorrad Coolant or equivalent ethylene glycol-based coolant with corrosion inhibitors (mixture ratio 50:50 with distilled water)
Hall Sender Unit:
Failure of the Hall sender unit can cause intermittent or no-start conditions.
Fuel Pump Relay:
Faulty fuel pump relay can prevent the fuel pump from operating.
Clutch Slave Cylinder:
Leaking clutch slave cylinder seals can lead to a spongy clutch lever.
Final Drive Bearings:
Wear in final drive bearings can lead to play and potential failure.
ABS Modulator:
Early ABS systems can be prone to modulator failures.
Legacy:
BMW Motorrad's long history of producing reliable, technically advanced motorcycles
R Series Introduction:
The R1100 series marked a significant evolution with the introduction of the Telelever front suspension and a move to 4-valve cylinder heads for increased performance.
Model Variants:
The R1100 platform was adapted for various touring and sport-touring needs: RT (Touring), RS (Sport-Touring), GS (Dual-Sport), R (Naked/Standard).
Production Years:
Mid-1990s to early 2000s (e.g., R1100 RT 1994-2001, R1100 RS 1993-2001, R1100 GS 1993-1999, R850 models generally from 1995 onwards).
