Segment:
Touring/Adventure Motorcycle
Target Audience:
Owners, independent workshops, motorcycle enthusiasts who perform their own maintenance and repairs.
Competitors 2000:
Honda Pan European, Yamaha TDM850, Moto Guzzi California, Triumph Trophy.
Bmw Philosophy:
Emphasis on engineering, rider comfort, shaft drive reliability, and long-distance capability.
Model Differentiation:
The R850GS offers a more accessible and manageable platform compared to its larger R1150GS sibling, while retaining the core GS adventure touring DNA.
Primary Coverage:
Service, Repair, Maintenance, Troubleshooting, Diagnostics
Specific Systems:
Engine, Fuel System, Ignition System, Exhaust System, Transmission, Drive Train, Suspension, Brakes, Electrical System, Chassis, Bodywork
Estimated Page Count:
Approximately 300-500 pages (typical for comprehensive workshop manuals)
Type:
Workshop Service Repair Manual
Format:
Digital (PDF) - Assumed based on typical product listings for this type of manual
Engine Mechanical:
Detailed breakdown and assembly of the Boxer twin engine, including cylinder heads, pistons, connecting rods, crankshaft, camshafts, valve timing.
Fuel System:
Fuel injection system (Motronic), fuel pump, injectors, throttle body, fuel tank, lines, and EVAP system.
Ignition System:
Ignition timing, spark plugs, ignition coils, Motronic control unit, troubleshooting.
Exhaust System:
Exhaust manifold, catalytic converter (if applicable), mufflers, lambda sensors (oxygen sensors).
Transmission:
Gearbox disassembly, inspection, repair, clutch operation, final drive, driveshaft, universal joint, spline lubrication.
Suspension:
Front Telelever fork (maintenance, seal replacement, oil levels), rear Monolever swingarm, shock absorber (adjustment, replacement).
Brakes:
Front and rear brake systems (ABS II or non-ABS), brake calipers, master cylinders, brake lines, pads, discs, bleeding procedures, fluid specifications.
Electrical System:
Battery, charging system (alternator, voltage regulator), starter motor, lighting system (headlights, taillights, indicators), horn, fuses, relays, wiring diagrams, control units (ECU, ABS).
Chassis And Frame:
Frame inspection, steering head bearings, wheel bearings, maintenance of all chassis components.
Bodywork:
Fairings, tank, seat, fenders, mounting points, care, and minor repair procedures.
Routine Maintenance:
Oil and filter changes, spark plug replacement, air filter inspection/replacement, brake fluid flush, clutch fluid flush, final drive oil change, valve clearance checks.
Troubleshooting:
Diagnostic procedures for common issues, fault code interpretation (if applicable), symptom-based troubleshooting.
Major Repairs:
Engine rebuilds, gearbox overhauls, suspension component replacement, electrical system diagnostics and repair.
Specifications Data:
Torque specifications for all fasteners, fluid capacities, tolerances, wear limits, electrical specifications.
Depth:
Comprehensive, suitable for professional mechanics and advanced DIY enthusiasts. Covers everything from routine service to complete engine and gearbox rebuilds.
Type:
Four-stroke, air-cooled, two-cylinder boxer engine
Displacement:
848 cc (850cc class)
Bore X Stroke:
90.0 mm x 66.0 mm
Compression Ratio:
10.0:1
Valve Train:
Overhead camshaft (SOHC) per cylinder, two valves per cylinder, pushrod activated.
Horsepower:
Approx. 70 hp (51 kW) at 6750 rpm
Torque:
Approx. 76 Nm (56 lb-ft) at 5000 rpm
Induction:
Bosch Motronic 2.4 fuel injection and ignition management system
Fuel Type:
Unleaded gasoline (Octane rating 95 RON recommended)
Fuel Tank Capacity:
Approx. 20 liters (5.3 US gallons)
Instrumentation:
Analog speedometer and tachometer, LCD display for odometer, trip meter, clock, and other basic information.
ABS:
BMW's ABS II system, a significant safety feature for its era, providing enhanced braking control, especially in adverse conditions.
Diagnostics:
On-board diagnostic capabilities via BMW's proprietary connector, allowing for reading fault codes and parameters.
Oil Change:
Every 10,000 km or annually (whichever comes first).
Valve Check:
Every 20,000 km.
Final Drive Oil:
Change every 20,000 km.
Engine Oil:
SAE 20W-50 API SG/SH or JASO MA. Capacity approx. 4 liters with filter change.
Brake Fluid:
DOT 4 (for both front and rear systems).
Clutch Fluid:
DOT 4 (for hydraulic clutch actuation).
Transmission Oil:
SAE 80W-90 API GL-5.
Fork Oil:
BMW Fork Oil (or equivalent SAE 7.5W). Capacity approx. 440 ml per leg.
Hall Sender Unit:
Failure of the Hall sender unit can lead to starting issues or sudden engine cut-out.
Fuel Pump:
Early models might experience fuel pump wear.
Spline Wear:
Regular lubrication of the driveshaft and final drive splines is critical to prevent premature wear.
Throttle Cable:
Sticking or fraying throttle cables can impact throttle response.
