Positioning:
Essential resource for owners and independent workshops seeking to maintain and repair the R850GS/R850R models.
Value Proposition:
Offers comprehensive coverage that rivals dealership-level service information, saving time and money on repairs.
Feature 1:
All-encompassing repair procedures for all major vehicle systems.
Feature 2:
Detailed diagnostic information and troubleshooting guides.
Feature 3:
Crucial technical specifications, torque values, and clearances.
Engine:
Detailed coverage of the Boxer twin-cylinder engine, including overhaul, tuning, and diagnostics.
Fuel System:
Injection system (e.g., Bosch Motronic), fuel pump, injectors, fuel lines, and tank service.
Ignition System:
Spark plugs, ignition coils, timing, and related electronic components.
Transmission:
Gearbox (5-speed), clutch, final drive (driveshaft and bevel gear).
Brakes:
Front and rear brake systems, ABS (if equipped), hydraulic lines, calipers, discs, and master cylinders.
Suspension:
Front Telelever suspension, rear Monolever swingarm, shock absorbers, fork seals, and adjustment procedures.
Electrical System:
Wiring diagrams, battery, charging system (alternator, regulator), starter motor, lighting, and instrument cluster.
Chassis And Bodywork:
Frame inspection, fairings, seat, fuel tank removal/installation, exhaust system, and wheels.
Scheduled Maintenance:
Oil changes, filter replacements, spark plug service, brake fluid flush, and other routine upkeep.
Troubleshooting:
Diagnostic procedures for common problems, fault finding charts, and error code interpretation.
Engine Rebuild:
Detailed instructions for complete engine disassembly, inspection, repair, and reassembly.
Transmission Overhaul:
Steps for clutch replacement, gearbox disassembly and reassembly, and final drive servicing.
Brake System Repair:
Bleeding procedures, pad and disc replacement, caliper servicing, and master cylinder overhaul.
Suspension Service:
Fork seal replacement, shock absorber servicing, and linkage lubrication.
Electrical Diagnostics:
Wiring diagram interpretation, component testing, and troubleshooting electrical faults.
Depth:
Professional Quality; In-depth coverage suitable for experienced mechanics and DIY enthusiasts.
Detail Level:
Includes detailed specifications, torque values, clearances, and diagnostic parameters.
Type:
Air-cooled, four-stroke Boxer twin-cylinder engine
Displacement:
848 cc (approx.)
Bore X Stroke:
90.0 mm x 66.0 mm (approx.)
Horsepower:
Approximately 70-75 hp @ 7250 rpm (model dependent)
Torque:
Approximately 79-83 Nm @ 5750 rpm (model dependent)
Injection System:
Bosch Motronic electronic fuel injection
Fuel Type:
Unleaded gasoline (95 RON recommended)
Oil Type:
API SG / SH / SJ or higher, SAE 20W-40 or 20W-50 motorcycle specific
Oil Capacity:
Approx. 3.0 liters (with filter change)
Type:
5-speed, constant mesh gearbox
Drive Type:
Shaft drive via Paralever system
Transmission Options:
Not Applicable (all models featured the same transmission)
Clutch Type:
Single dry plate, diaphragm spring clutch
Transmission Oil Type:
SAE 75W/90 GL-5 gear oil for gearbox; SAE 80W/90 GL-5 for final drive bevel gear
Oil Change Interval:
Every 10,000 km or annually, whichever comes first.
Major Service Interval:
Every 20,000 km, including valve clearance checks, spark plug replacement, and gearbox/final drive oil change.
Brake Fluid Flush:
Every 2 years.
Engine Oil Spec:
API SG/SH/SJ or higher, SAE 20W-40 or 20W-50 (specific BMW recommendations may vary, refer to manual).
Gearbox Oil Spec:
SAE 75W/90 GL-5.
Final Drive Oil Spec:
SAE 80W/90 GL-5.
Coolant Type:
Not applicable (air-cooled engine).
Common Issue 1:
Oil leaks from engine seals (e.g., crankshaft seal, oil cooler seals).
Common Issue 2:
Wear on the fuel pump internal components.
Common Issue 3:
ABS system faults (if equipped), often related to sensor or modulator issues.
Common Issue 4:
Fork seal leaks, especially on higher mileage machines.
Heritage:
BMW Motorrad has a long history of producing reliable and innovative motorcycles, particularly known for its Boxer engines and shaft drive.
R850 Series:
The R850 series was introduced as a more accessible alternative to the larger R1100/R1150 models, offering similar Boxer characteristics in a slightly detuned and lighter package.
Production Period:
The R850R and R850GS were produced roughly from 1996 to 2007, with the specified years representing a core production run.
