Target Audience:
Owners and independent repair shops specializing in BMW motorcycles.
Value Proposition:
Provides comprehensive factory-level repair and maintenance information, crucial for preserving the performance and longevity of a classic BMW motorcycle.
Uniqueness:
Focuses on a specific model and year, ensuring relevance and accuracy for the target vehicle.
Engine:
Detailed disassembly, assembly, inspection, and repair procedures for the R850 boxer twin engine.
Fuel System:
Fuel injection system (Bosch Motronic), fuel pump, injectors, fuel lines, throttle body maintenance and troubleshooting.
Ignition System:
Ignition coils, spark plugs, ECU control, timing adjustments.
Transmission:
Five-speed gearbox, clutch (dry single-plate), final drive, transmission fluid specifications and replacement.
Suspension:
Front Telelever suspension, rear Monolever swingarm, shock absorbers, fork seals, wheel bearings, steering head bearings.
Brakes:
Integral ABS II (if equipped), front and rear brake calipers, master cylinders, brake fluid specifications and bleeding procedures, disc and pad replacement.
Electrical System:
Wiring diagrams, battery, alternator, starter motor, lighting system, instrument cluster, fuses, relays, starter interlock.
Chassis And Bodywork:
Frame inspection, body panel removal and installation, seat, handlebars, footpegs, exhaust system.
Scheduled Maintenance:
Detailed step-by-step instructions for all scheduled maintenance tasks at various mileage intervals.
Troubleshooting:
Diagnostic guides and flowcharts for common and uncommon problems, fault codes (if applicable).
Repair Procedures:
Comprehensive instructions for component removal, repair, and reinstallation.
Engine Rebuild:
Torque specifications, piston and cylinder dimensions, valve clearance adjustment, crankshaft and connecting rod procedures.
Diagnostic Tests:
Procedures for testing various electrical and mechanical components using specialized tools or basic methods.
Depth Of Coverage:
In-depth, professional-level technical information suitable for experienced mechanics and dedicated DIY enthusiasts.
Diagnostic Capabilities:
Covers advanced diagnostics for engine management, ABS, and other electronic systems.
Engine Type:
Air-cooled, four-stroke flat-twin (boxer) engine
Displacement:
848 cc (850cc designation)
Bore X Stroke:
90.0 mm x 66.0 mm
Valve Train:
Overhead camshaft (SOHC), 2 valves per cylinder, pushrod actuated.
Power Output Hp:
Approx. 70 hp (52 kW) @ 7000 rpm (varies slightly by market)
Torque Output Lb-Ft:
Approx. 76 Nm (56 lb-ft) @ 5000 rpm (varies slightly by market)
Fuel Delivery:
Electronic fuel injection (Bosch Motronic 2.4)
Fuel Type:
Unleaded gasoline, minimum 95 RON
Cooling Method:
Air cooling
Transmission Type:
5-speed manual gearbox
Clutch Type:
Dry, single-plate diaphragm spring clutch
Final Drive:
Shaft drive via BMW's Monolever system
Gear Ratios:
Specific ratios available in manual; includes primary, 1st, 2nd, 3rd, 4th, 5th, and final drive ratio.
Transmission Fluid Type:
SAE 75W-90 API GL-5 (or specified BMW equivalent)
Transmission Oil Capacity:
Approx. 0.9 Liters
ABS System:
BMW Integral ABS II (optional on some models, standard on others, covered if equipped).
Braking System:
Disc brakes front and rear with ABS capability. Specific caliper and rotor details provided.
Lighting:
Halogen headlight, tail light, turn signals, brake light functionality and maintenance.
Instrument Cluster:
Analog speedometer and tachometer, LCD display for odometer, trip meter, clock, and warning lights. Indicator for heated grips (if equipped).
ABS System:
Integral ABS II (optional, provides anti-lock braking for both wheels, controllable via brake lever).
Diagnostic Interface:
Diagnostic port for electronic fault diagnosis (requires specialized BMW tools or compatible aftermarket scanners).
Oil Change Interval:
Typically every 10,000 km (6,000 miles) or annually, whichever comes first (refer to manual for exact specification).
Valve Clearance Check:
Generally at 20,000 km (12,000 miles) or as specified for this model.
Major Service Interval:
Detailed in the manual, often involving drivetrain inspection, filter changes, and fluid flushes.
Engine Oil Type:
SAE 20W-50 API SG or higher (BMW recommended or equivalent)
Engine Oil Capacity:
Approx. 2.75 Liters (with filter change)
Brake Fluid Type:
DOT 4 (or as specified by BMW for ABS systems)
Coolant Type:
N/A (Air-cooled engine)
Common Wear Items:
Clutch wear, alternator brushes, fork seals, head bearings, fuel pump reliability, ABS sensor issues (if applicable).
Typical Repairs:
Routine maintenance, brake system overhauls, suspension servicing, electrical component diagnosis.
Bmw Motorcycles:
BMW Motorrad has a long and storied history, dating back to the early 20th century, known for engineering excellence, reliability, and boxer engine configurations.
R850R Lineage:
The R850R was introduced as a more accessible and budget-friendly alternative to the larger displacement R1100 and R1150 series, sharing many components but with a smaller bore engine. It was part of BMW's transition to fuel injection and modular design.
Production Years R Series:
The R series has been in continuous production with various iterations and displacements since the 1920s.
Bmw Motorcycle Reputation:
BMW motorcycles, including the R850R, are generally recognized for their build quality, rider comfort, and innovative engineering, often receiving accolades for their durability and touring capabilities.
