Positioning:
Targeted at owners and independent workshops seeking in-depth technical information for maintenance and repair of the BMW R850 R and R 850 C models.
Advantage:
Provides a level of detail comparable to official BMW service documentation, empowering users with accurate and comprehensive repair data.
Features:
Detailed diagrams, exploded views, specifications, torque values, troubleshooting trees, and step-by-step procedures.
Models Covered:
All R 850 R and R 850 C variants
Engine Variants Covered:
All engine configurations for the 2004 model year
Trim Levels Covered:
All trim levels
Transmission Types Covered:
All transmission types (likely only one standard for this model)
Estimated Page Count:
Estimated 400-600 pages (typical for comprehensive workshop manuals)
Type:
Workshop Repair Service Manual
Engine Mechanical:
Complete engine disassembly, assembly, inspection, and overhaul procedures for the R850 boxer-twin engine.
Engine Fuel System:
Fuel injection system (EFI), fuel pump, injectors, fuel pressure regulator, throttle body, and sensors.
Engine Ignition System:
Ignition coils, spark plugs, ECU control, timing.
Engine Cooling System:
Air cooling system specifics, fan operation (if applicable), heat management.
Transmission:
Clutch operation, gearbox disassembly, assembly, inspection, lubrication, and troubleshooting.
Drivetrain:
Driveshaft, final drive unit (bevel gear), universal joints, bearings, and sealing.
Brakes:
Hydraulic brake system, ABS (if equipped), brake fluid, calipers, master cylinders, brake lines, rotors, and pads.
Suspension:
Front fork (BMW Telelever system), rear shock absorber (Monolever system), linkages, bearings, and seals.
Electrical System:
Wiring diagrams, battery, alternator, starter motor, lighting, fuses, relays, ECU, diagnostics, instrument cluster.
Chassis And Bodywork:
Frame inspection, body panel removal and installation, fairings, seat, fuel tank, fenders.
Wheels And Tires:
Wheel bearing inspection and replacement, tire pressures, rim specifications.
Maintenance:
Oil changes, filter replacements, spark plug replacement, air filter service, brake bleeding, clutch adjustment, lubrication points.
Troubleshooting:
Diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides.
Repair:
Detailed step-by-step repair instructions for all major components and systems.
Overhaul:
Complete engine, transmission, and final drive overhaul procedures.
Diagnostics:
Information on using diagnostic tools, interpreting fault codes, and performing system checks.
Depth:
Comprehensive: Covers everything from basic maintenance to full engine rebuilds and advanced electrical diagnostics.
Engine Type:
Air-cooled, four-stroke boxer-twin engine
Displacement:
848 cc (51.7 cu. in.)
Bore X Stroke:
90.0 mm x 66.0 mm (3.54 in x 2.60 in)
Horsepower:
Approx. 70 hp @ 7,000 rpm (specific to model variant)
Torque:
Approx. 77 Nm (57 lb-ft) @ 5,000 rpm (specific to model variant)
Fuel Delivery:
Electronic Fuel Injection (EFI), Bosch Motronic MA 2.4
Fuel Type:
Unleaded gasoline, minimum 91 octane (RON+MON)/2
Ignition Type:
Electronic ignition with knock sensor
Oil Capacity:
Approx. 3.0 liters (3.2 US qt) with filter change
Oil Type Specification:
SAE 20W-50 or 15W-50 motorcycle specific, API SG or higher (check manual for exact BMW approval)
Length:
Varies by model (R 850 R vs R 850 C), typically around 2,180 mm (85.8 in)
Width:
Varies by model, typically around 850 mm (33.5 in)
Height:
Varies by model, typically around 1,250 mm (49.2 in)
Dry Weight:
Approx. 217 kg (478 lbs) for R 850 R, R 850 C may differ
Gross Vehicle Weight Rating:
Approx. 440 kg (970 lbs)
Instrument Cluster:
Analog speedometer and tachometer, digital odometer, trip meter, clock, and indicator lights. Later models might have more advanced displays.
ABS:
Optional Integral ABS system, which combines braking actuation for both wheels when the rider applies the rear brake lever.
Diagnostics Port:
Diagnostic connector for connecting to BMW's diagnostic software (e.g., GT1, MoDiTec) for fault code reading and system analysis.
Oil Change Interval:
Typically every 10,000 km (6,000 miles) or annually, whichever comes first (refer to manual for exact interval).
Valve Clearance Check:
Typically every 20,000 km (12,000 miles) or as per manual recommendations.
Spark Plug Replacement:
Every 20,000 km (12,000 miles) or as recommended.
Brake Fluid:
DOT 4 (refer to manual for exact BMW approval and change interval)
Coolant:
N/A (Air-cooled engine)
Common Issues:
Typical issues can include stator failure, fuel pump issues, ABS sensor problems, clutch slave cylinder leaks, and wear on the Telelever/Monolever pivot bearings. The manual will provide specific diagnostic and repair procedures for these.
Heritage:
BMW Motorrad, established 1923, renowned for boxer-twin engines, shaft drive, and touring capabilities.
Evolution:
The R 850 R/C series is a derivative of the larger R 1100/1150 series, offering a more accessible displacement while retaining the core BMW boxer-twin architecture and Telelever/Monolever suspension. Introduced to provide a slightly lighter and more manageable option.
Production Period:
The R 850 R/C was produced from the late 1990s until the mid-2000s, with the 2004 model representing a later iteration.
