Target Audience:
BMW R850 R850GS owners, independent repair shops, motorcycle technicians.
Value Proposition:
Provides essential technical data and procedures to maintain and repair the R850 R850GS, reducing reliance on expensive dealerships.
Features:
Detailed diagrams, step-by-step instructions, technical specifications, troubleshooting flowcharts.
Covered Models:
All R850 R850GS models
Covered Engines:
All engine variants for R850 R850GS
Covered Trims:
All trim levels for R850 R850GS
Covered Transmissions:
All transmissions for R850 R850GS
Estimated Page Count:
Refer to actual PDF for exact count, typically 300-600 pages for this era's BMW manuals.
Manual Format:
PDF Download
Manual Classification:
Workshop Repair Service Manual
Language:
Likely English, with potential for other European languages depending on original publication.
Engine Systems:
Engine mechanical, lubrication, cooling, fuel system, ignition system, exhaust system, emissions control.
Drivetrain Systems:
Transmission (gearbox), clutch, final drive (shaft drive), wheels, tires.
Chassis Systems:
Frame, suspension (front fork, rear shock absorber), steering, brakes (front and rear), ABS (if equipped).
Electrical Systems:
Wiring diagrams, battery, charging system (alternator, voltage regulator), lighting, instrumentation, starting system, ECU and sensors.
Bodywork And Accessories:
Body panels, fairings, seat, fuel tank, fairing mounts, luggage systems (if applicable to GS model).
Maintenance Procedures:
Scheduled maintenance, oil changes, filter replacements, spark plug replacement, brake fluid flush, coolant replacement, valve clearance adjustment.
Diagnostic Procedures:
Troubleshooting guides, symptom-based diagnostics, fault code interpretation (if OBD applicable).
Repair Procedures:
Component disassembly, inspection, repair, and reassembly for all major systems.
Technical Adjustments:
Carburetor synchronization (if applicable), idle speed adjustment, throttle cable adjustment, brake lever and pedal adjustment.
Depth Of Information:
Comprehensive, covering routine maintenance to major overhauls and diagnostics. Includes torque specifications, clearances, and special tool requirements.
Engine Type:
Air-cooled, four-stroke, horizontally opposed boxer twin
Bore X Stroke:
90.0 mm x 66.0 mm (approximate, refer to manual for exact)
Compression Ratio:
10.0:1 (approximate, refer to manual for exact)
Horsepower:
Approx. 70 hp (52 kW) @ 7250 rpm (for R850R/GS)
Torque:
Approx. 75 Nm (55 lb-ft) @ 5500 rpm (for R850R/GS)
Fuel Delivery:
Bosch Motronic Electronic Fuel Injection (EFI)
Fuel Type:
Unleaded gasoline, minimum 95 octane (RON)
Valve Train:
Overhead camshaft (OHC), 2 valves per cylinder actuated by pushrods and rocker arms
Cooling System:
Air cooling with oil cooling circuit (oil cooler typically present)
Safety Standards:
Meets all applicable motorcycle safety standards for its production year.
Braking System:
BMW Motorrad Integral ABS (optional on R850GS), hydraulic disc brakes front and rear.
Lighting:
Halogen headlight, LED taillight, turn signals.
Frame Construction:
Steel tube frame, providing robust structural integrity.
Infotainment Features:
Basic instrumentation: speedometer, tachometer, odometer, trip meter, fuel level indicator, warning lights. No advanced infotainment systems typically found on this model.
Driver Assistance Systems:
Optional Integral ABS system. No electronic rider aids like traction control or riding modes on this model.
Oil Change Interval:
Typically every 10,000 km or annually, whichever comes first (refer to manual for exact specification).
Valve Adjustment Interval:
Typically every 20,000 km or annually (refer to manual for exact specification).
Engine Oil Type:
SAE 20W-40 or 20W-50 motorcycle specific oil, API SG or higher (refer to manual for exact spec).
Engine Oil Capacity:
Approx. 3.0 liters (3.2 US qt) with filter change (refer to manual for exact capacity).
Gearbox Oil Type:
SAE 80W-90 GL-5 hypoid gear oil (refer to manual for exact specification).
Final Drive Oil Type:
SAE 80W-90 GL-5 hypoid gear oil (refer to manual for exact specification).
Brake Fluid Type:
DOT 4 hydraulic brake fluid (refer to manual for exact specification).
Coolant Type:
If oil cooler is present and uses coolant, typically a 50/50 mix of ethylene glycol coolant and distilled water (refer to manual for exact type).
Common Wear Items:
Clutch wear, transmission input shaft seal leaks, fuel pump reliability, alternator output, paralever pivot bearings.
Electrical Gremlins:
Occasional issues with wiring harness connections, particularly in areas exposed to moisture or vibration.
Manufacturer History:
BMW Motorrad has a long and distinguished history dating back to the early 20th century, renowned for its engineering, durability, and rider comfort.
R Series Legacy:
The R850GS is part of BMW's iconic 'R' series, building upon the boxer engine platform with a focus on versatility and adventure touring, evolving from earlier models like the R100GS.
Production Period:
The R850GS was produced primarily in the late 1990s and early 2000s, serving as a slightly smaller displacement alternative to the R1100GS and later R1150GS models.
