Target Audience:
Owners and independent repair shops of BMW R850 R850GS motorcycles
Value Proposition:
Provides essential, dealer-level repair information to reduce reliance on expensive authorized service centers
Coverage Scope:
Covers all major mechanical, electrical, and bodywork aspects of the specified model year
Content Source:
Based on factory service procedures used by professional technicians
Primary Coverage:
Comprehensive service and repair for BMW R850 R850GS
Secondary Coverage:
Maintenance, troubleshooting, diagnostics, and component replacement
Estimated Page Count:
500+
Type:
Workshop Manual / Service Manual
Format:
Digital (likely PDF)
Engine:
2-cylinder boxer, air-cooled, four-stroke (specifics for R850cc variant)
Fuel System:
Fuel Injection (BMW System 2.2 or similar), throttle body, fuel pump, injectors
Ignition System:
Electronic Ignition (BMW Motronic or similar)
Transmission:
5-speed manual gearbox, clutch system, final drive (shaft drive)
Brakes:
Front and rear disc brakes, ABS (if equipped), hydraulic system, caliper maintenance
Suspension:
Front telelever suspension, rear Monolever swingarm, shock absorber adjustment and service
Electrical System:
Battery, charging system (alternator, regulator), starter motor, lighting, wiring diagrams, diagnostics
Chassis And Bodywork:
Frame, fairing, fuel tank, seat, wheels, tires, controls
Routine Maintenance:
Oil changes, filter replacements, spark plug service, valve clearance adjustment, drive shaft lubrication
Troubleshooting:
Diagnostic charts, fault finding for engine, electrical, and mechanical issues
Engine Repair:
Top-end rebuild, bottom-end disassembly/assembly, piston and ring replacement, cylinder head service
Transmission Repair:
Clutch replacement, gearbox disassembly and reassembly, final drive overhaul
Brake System Service:
Brake pad replacement, caliper service, bleeding procedures, ABS system diagnostics (if applicable)
Suspension Service:
Fork seal replacement, shock absorber rebuild, linkage lubrication
Electrical Diagnostics:
Wiring diagram interpretation, component testing, ECU troubleshooting (basic)
Depth:
In-depth technical repair and overhaul procedures, suitable for professional mechanics and advanced DIY enthusiasts
Engine Type:
Air-cooled, four-stroke, horizontally opposed twin-cylinder (Boxer)
Displacement:
848 cc (approximate)
Bore X Stroke:
90.0 mm x 66.0 mm (typical for R850 Boxer variants)
Compression Ratio:
10.0:1 (typical for R850 Boxer variants)
Horsepower:
~70 HP @ 6750 RPM (typical for R850 models)
Torque:
~77 Nm (57 lb-ft) @ 4750 RPM (typical for R850 models)
Fuel Delivery:
Electronic Fuel Injection (EFI)
Fuel Type:
Unleaded gasoline, minimum 95 RON
Oil Type:
BMW Motorrad recommends SAE 20W-50 or 15W-50 motorcycle specific oil meeting API SG/SH or higher.
Oil Capacity:
~3.0 Liters (including filter change)
Type:
5-speed constant mesh gearbox
Clutch Type:
Single dry plate, diaphragm spring clutch
Final Drive:
Shaft drive with universal joint
Gear Ratios:
Detailed ratios for each gear will be found within the manual.
Gearbox Oil:
SAE 75W-90 API GL-4 or GL-5 gear oil.
Gearbox Oil Capacity:
~0.6 Liters
ABS:
Optional ABS II system available on some models.
Braking System:
Dual front disc, single rear disc with advanced hydraulic actuation. Potential for ABS integration.
Lighting:
Halogen headlight, LED taillight, turn signals.
Instrumentation:
Analog tachometer and speedometer, LCD display for odometer, trip meters, clock, and warning lights.
ABS System:
Optional ABS II system enhances braking safety, fully covered in the manual for maintenance and diagnostics.
Diagnostic Port:
BMW's proprietary diagnostic connector for engine management system checks (requires specific tools/adapters).
Oil Change Interval:
Every 10,000 km or annually, whichever comes first.
Valve Clearance Check:
Every 20,000 km.
Spark Plug Replacement:
Every 20,000 km (or as specified for specific plug types).
Drive Shaft Lubrication:
Every 10,000 km (spline lubrication).
Brake Fluid:
DOT 4 recommended.
Coolant:
N/A (Air-cooled engine)
Common Wear Items:
Clutch wear, paralever pivot bearings, fuel pump relay failures (on some models), exhaust header leaks.
Electrical Concerns:
Can include intermittent issues with starter motor solenoid or charging system components if not maintained.
Manufacturer:
BMW Motorrad, renowned for engineering excellence and durable motorcycles.
Development:
Part of the R series boxer engine lineage, adapted for the adventure touring segment with the 'GS' designation.
Manufacturing Location:
Berlin, Germany
Production Period:
R850GS produced primarily from 1999 to 2001.
