Model Variant:
R850C (Cruiser)
Model Years Covered:
1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
Internal Model Code:
R850C (likely part of the R21/R22 family, specific R850C code may vary but shares many components with R1150RT/RS/GS of the era)
Model Segment:
Cruiser segment, offering a relaxed riding posture and touring capability within BMW's boxer-twin lineup.
Competitors:
Competed against other mid-size cruisers and touring motorcycles from brands like Harley-Davidson, Honda, Yamaha, and Moto Guzzi during its production run.
Engine Layout:
Air/oil-cooled flat-twin (boxer) engine, a signature BMW characteristic.
Drivetrain:
Shaft drive, renowned for its low maintenance and smooth power delivery.
Design Philosophy:
Blends BMW's engineering prowess with cruiser styling cues, offering a unique alternative in the market.
Engine System:
Engine assembly, disassembly, overhaul, lubrication system, cooling system, fuel system (including injection components), ignition system, exhaust system.
Transmission And Drivetrain:
Clutch operation and adjustment, gearbox (transmission) internal inspection and repair, final drive (shaft drive) maintenance and overhaul.
Chassis And Suspension:
Front fork (telescopic) servicing, rear suspension (monoshock or twin shock depending on exact variant interpretation, though R850C is typically monoshock), wheel bearing inspection and replacement, steering head bearing maintenance.
Braking System:
Brake fluid replacement, caliper servicing, master cylinder overhaul, ABS system diagnostics and bleeding (if equipped).
Bodywork And Fittings:
Fairing removal and installation, seat adjustment, fuel tank maintenance, fenders, saddlebags (if applicable), exhaust system mounting.
Electrical System:
Wiring diagrams, battery maintenance, charging system (alternator, regulator), starter motor, lighting system, instrumentation, fuel injection ECU troubleshooting, sensor diagnostics.
Preventative Maintenance:
Scheduled maintenance tasks, oil change procedures, filter replacement, spark plug service, brake fluid flush, valve clearance checks, lubrication points.
Troubleshooting:
Diagnostic procedures for common and uncommon issues, fault finding flowcharts, error code interpretation (for electronic systems).
Repair And Rebuild:
Step-by-step instructions for component disassembly, inspection, repair, and reassembly for all major vehicle systems.
Torque Specifications:
Crucial torque values for critical fasteners throughout the motorcycle.
Diagnostic Capabilities:
Advanced diagnostics, including troubleshooting of the electronic fuel injection (EFI) system and ABS (if applicable), sensor testing, and electrical circuit analysis.
Rebuild Procedures:
Comprehensive procedures for engine rebuild, gearbox overhaul, and suspension component refurbishment.
Special Tools:
Identification and usage of specialized BMW tools required for specific maintenance and repair tasks.
File Format:
PDF (Portable Document Format)
Print Quality:
High-resolution scans/digital creation for clarity of diagrams and text.
Binding Type:
Not Applicable (Downloadable Digital Format)
Paper Type:
Not Applicable (Downloadable Digital Format)
Searchable Text:
Likely includes searchable text for quick information retrieval.
Engine Type:
Air/oil-cooled, four-stroke, boxer-twin engine
Displacement:
848 cc (approx.)
Bore X Stroke:
90.0 mm x 66.0 mm (typical for R850 series)
Compression Ratio:
10.0:1 (typical)
Valve Train:
Overhead camshaft (SOHC), 2 valves per cylinder, pushrod actuated (typical for R generation)
Horsepower:
Approx. 70-75 hp @ 6750 rpm (varies slightly by market and specific model year)
Torque:
Approx. 79 Nm (58 lb-ft) @ 5000 rpm (varies slightly by market and specific model year)
Fuel Delivery:
Electronic Fuel Injection (Bosch Motronic MA 2.4 or similar)
Fuel Type:
Unleaded gasoline, minimum 95 RON
Fuel Tank Capacity:
Approx. 19.5 liters (5.1 gallons)
Length:
Approx. 2245 mm (88.4 in)
Width:
Approx. 800 mm (31.5 in) (excluding mirrors)
Height:
Approx. 1350 mm (53.1 in) (to handlebars)
Seat Height:
Approx. 770 mm (30.3 in) (standard seat)
Dry Weight:
Approx. 220 kg (485 lbs)
Gross Vehicle Weight Rating:
Approx. 430 kg (948 lbs)
Instrumentation:
Analog speedometer and tachometer, digital display for odometer, trip meters, clock, and potentially fuel level/gear indicator.
ABS Availability:
Available as an optional feature on many R850C models, enhancing braking safety.
Diagnostic Ports:
Likely features a diagnostic port for connection to BMW's diagnostic tools (e.g., GT1 or DIS) for advanced electronic system checks.
Oil Change Interval:
Typically every 10,000 km (6,000 miles) or annually.
Valve Clearance Check:
Usually at 10,000 km (6,000 miles) or as specified in the manual.
Engine Oil Type:
BMW recommends specific synthetic motorcycle oils (e.g., SAE 20W-50 or 15W-50 depending on temperature), refer to manual for exact BMW spec (e.g., BMW Motor Oil HP-S).
Gearbox Oil Type:
Hypoid gear oil, API GL-5, SAE 75W-90 or 80W-90.
Final Drive Oil Type:
Hypoid gear oil, API GL-5, SAE 75W-90 or 80W-90.
Brake Fluid Type:
DOT 4 brake fluid.
Common Wear Items:
Clutch wear, potential for ABS sensor issues (if equipped), steering head bearings, general wear and tear on suspension components.
Engine Reliability:
Generally robust boxer engines, but regular maintenance is key. Attention to oil levels and timely servicing are paramount.
Bmw Motorrad History:
BMW Motorrad has a long and illustrious history dating back to the early 20th century, known for innovation, engineering excellence, and iconic boxer-twin engines.
R Series Evolution:
The R850C is part of BMW's long-standing R series of boxer-twin motorcycles, which evolved from the early R32. The R850C was a specific cruiser variant aimed at a different market segment, often sharing many components with its larger R1150 siblings.
Production Period:
Produced approximately from the late 1990s through the mid-2000s.
