Target Audience:
BMW motorcycle owners and independent repair shops seeking detailed technical information for servicing and repairing R1100RT, R1100RS, R850/1100GS, and R850/1100R models.
Bike Segment:
Sport-Touring (RT, RS) and Adventure/Dual-Sport (GS) motorcycles.
Value Proposition:
Provides factory-level diagnostic and repair information, empowering users to perform complex tasks, save on dealership costs, and ensure proper maintenance.
Essential Resource:
Indispensable tool for understanding the intricate engineering of these BMW Boxer models and maintaining their performance and longevity.
Supported Models:
BMW R1100RT, BMW R1100RS, BMW R850GS, BMW R1100GS, BMW R850R, BMW R1100R
Compatible Years:
Covers models from the early 1990s through approximately 2000/2001, aligning with the production run of these specific variants.
Estimated Pages:
500-700 (typical for this era of BMW Boxer service manuals)
Type:
Service and Repair Manual (Full Service Manual - FSM)
Engine:
Complete engine disassembly, assembly, tuning, diagnostics, lubrication system, cooling system (oil-cooled), fuel system (EFI), ignition system.
Transmission:
Gearbox servicing, clutch operation and adjustment, final drive unit maintenance and repair.
Chassis And Suspension:
Wheels, tires, brakes (including ABS if equipped), suspension components (forks, shock absorbers), steering system, frame inspection and repair.
Electrical System:
Complete wiring diagrams, troubleshooting of electrical components, lighting, ignition, starting system, charging system, instrument cluster, sensors.
Bodywork And Trim:
Fairing removal and installation, seat adjustment, luggage systems, accessory mounting.
Exhaust System:
Inspection and replacement of exhaust components.
Fuel Tank And Lines:
Fuel tank removal, inspection, fuel line maintenance, and fuel filter replacement.
Instrumentation:
Dashboard, gauges, warning lights, and sensor readouts.
Maintenance:
Scheduled maintenance (oil changes, filter replacements, spark plug checks, valve adjustments), fluid level checks and top-offs.
Diagnostics:
Troubleshooting guides for common and uncommon problems, diagnostic fault codes, testing procedures for various components.
Repair:
Detailed step-by-step instructions for component repair and replacement, including engine rebuilds, transmission overhauls, and suspension work.
Special Tools:
Identification and usage of specialized BMW tools required for specific procedures.
Tire And Wheel Service:
Tire mounting and balancing, wheel bearing inspection and replacement, spoke tensioning (for GS models with spoked wheels).
Brake System Overhaul:
Brake pad replacement, caliper servicing, hydraulic system bleeding, ABS component diagnostics.
Engine Tuning:
Idle speed adjustment, fuel mixture adjustment (via diagnostic tools), ignition timing checks.
Depth:
Comprehensive coverage from basic maintenance to complete engine and drivetrain rebuilds, suitable for professional technicians and advanced DIY enthusiasts.
Torque Specifications:
Detailed torque values for all critical fasteners and components, essential for correct assembly and safety.
Wiring Diagrams:
Comprehensive, model-specific wiring diagrams with component identification and wire colors for accurate electrical troubleshooting.
Troubleshooting Flowcharts:
Systematic diagnostic flowcharts for identifying and resolving common issues across various motorcycle systems.
Component Diagrams:
Detailed exploded view diagrams of all major components for easy identification and assembly.
Type:
Four-stroke, air/oil-cooled, horizontally opposed two-cylinder boxer engine.
Displacement 1100:
1085 cc
Bore X Stroke 1100:
101 mm x 68 mm
Bore X Stroke 850:
90.8 mm x 83 mm
Horsepower 1100:
Approx. 90-95 hp (varies slightly by model and year)
Torque 1100:
Approx. 95-100 Nm (varies slightly by model and year)
Compression Ratio 1100:
10.7:1
Fuel Delivery:
Bosch Motronic Electronic Fuel Injection (EFI) with single throttle body (later models may have twin injectors per cylinder).
Fuel Type:
Unleaded Gasoline (RON 91 or higher)
Air Filter:
Paper element air filter, located in a dedicated housing.
Type:
Wet sump, engine oil sump integrated into crankcase.
Type:
Air and Oil cooling.
R1100Rt Features:
Often equipped with integrated fairing for aerodynamics and wind protection, adjustable windscreen, heated grips, and provision for radio/audio systems.
ABS System:
BMW's advanced ABS systems for enhanced braking safety, requiring specific diagnostic procedures outlined in the manual.
Diagnostic Port:
On-board diagnostics (OBD) system accessible via a diagnostic connector, crucial for fault code reading and parameter monitoring.
Oil Change:
Every 10,000 km (6,000 miles) or annually, whichever comes first. Check oil level weekly.
Valve Adjustment:
Every 20,000 km (12,000 miles).
Spark Plugs:
Inspect every 10,000 km (6,000 miles), replace as needed. Recommended replacement every 20,000 km (12,000 miles).
Brake Fluid Flush:
Every 2 years, or as per manual recommendation.
Engine Oil:
SAE 20W-50 or 15W-50 synthetic motorcycle oil conforming to API SG or higher. Capacity: Approx. 4.0 liters (4.2 US quarts) with filter.
Transmission Oil:
SAE 75W-90 synthetic gear oil.
Final Drive Oil:
SAE 75W-90 synthetic gear oil. Capacity: Approx. 250 ml (0.26 US quarts).
Coolant Type:
N/A (Oil/Air Cooled)
Common Wear Items:
Fuel pump internal components, clutch slave cylinder seals, paralever boot, alternator drive belt (if applicable to specific model year), starter motor brushes.
Electrical Gremlins:
While generally robust, occasional issues with wiring harnesses or sensor connections can occur, making good wiring diagrams essential.
Fuel Pump Reliability:
Early R1100 models could experience issues with the fuel pump relay or internal pump components. Manual provides testing procedures.
Paralever Pivot Bearings:
Wear on the paralever pivot bearings can lead to imprecise handling; manual details inspection and replacement.
Bmw Motorrad Legacy:
BMW Motorrad has a long and distinguished history of producing high-quality motorcycles, particularly known for its boxer engine configurations and touring capabilities.
R1100 Series Introduction:
The R1100 series, introduced in the early 1990s, marked a significant technological leap for BMW with the adoption of four-valve cylinder heads, fuel injection, and a more modern chassis design compared to its predecessors.
Production Years Approx:
1993 - 2000 (R1100 series), R850 variants introduced slightly later and produced alongside.
