Primary Coverage:
Mechanical, Electrical, Maintenance, Troubleshooting, Repair, Rebuild, Restoration
Specific Components Covered:
Motor, Engine Electrics, Fuel Preparation & Control, Fuel Tank & Lines, Exhaust System, Clutch, Gearbox, Front Fork, Steering, Rear Wheel Drive, Brakes, Wheels & Tyres, Frame, Equipment, Seat, General Electrical Equipment, Instruments, Lights
Type:
Workshop Service Repair Manual / Factory Service Manual (FSM) Equivalent
Engine Mechanical:
Complete engine tear down and rebuild, including pistons, cylinders, crankshaft, connecting rods, cams, valves, valve clearance adjustment, lubrication system, cooling system (where applicable).
Engine Electrical:
Ignition system (coils, spark plugs, ECU), charging system (stator, rectifier, regulator), starter system, battery maintenance, wiring diagrams.
Fuel System:
Fuel tank, fuel lines, fuel pump, fuel injection (EFI) system components, carburetor adjustments (if applicable to specific R850C variants), throttle control.
Drivetrain:
Clutch (operation, adjustment, replacement), gearbox (internal components, shifting mechanism), final drive (shaft drive, universal joints, rear drive unit).
Suspension Steering:
Front fork (disassembly, reassembly, fluid changes, seal replacement), steering head bearings, rear suspension linkage (if applicable), shock absorbers.
Brakes:
Brake system components (master cylinders, calipers, pads, discs), brake fluid replacement, bleeding procedures, ABS system (if equipped).
Wheels Tires:
Wheel bearing maintenance, tire pressure specifications, tire replacement, wheel balancing.
Frame Bodywork:
Frame integrity, body panel removal and installation, seat, fenders, exhaust system.
Electrical Equipment:
General wiring, lighting systems (headlights, taillights, turn signals), instrument cluster, switches, horn.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid level checks, spark plug replacement, valve clearance checks, chain/driveshaft lubrication.
Troubleshooting:
Step-by-step diagnostic procedures for common problems (e.g., no spark, starting issues, erratic engine performance), error code interpretation (if applicable).
Repair Rebuild:
Detailed instructions for component disassembly, cleaning, inspection, repair, and reassembly of all major systems.
Technical Data Provision:
Torque specifications, electrical component resistance values, fluid capacities, wear limits, diagnostic parameters.
Wiring Diagrams:
Comprehensive wiring schematics for electrical systems.
Depth:
Comprehensive, covering basic maintenance to complete engine and transmission overhauls. Designed for professional technicians and skilled DIY enthusiasts.
Engine Type:
Air-cooled, two-cylinder, boxer-twin (flat-twin)
Configuration:
Horizontally opposed cylinders
R850C Displacement:
848 cc
R1200C Displacement:
1170 cc
Power Delivery:
Known for strong low-end torque and smooth power delivery, characteristic of BMW's boxer engines.
Fuel Delivery:
Electronic Fuel Injection (EFI) for R1200C; R850C may feature EFI or carburetion depending on specific market and sub-model. Manual covers both possibilities.
Ignition:
Electronic ignition system
Oil Type Recommendation:
Refer to manual for specific viscosity grades (e.g., SAE 20W-50, SAE 15W-50) based on ambient temperature and BMW specifications. Likely API SG or higher.
Cooling Method:
Air-cooled (with oil cooling for some engine components)
Oil Change Interval:
Typically every 10,000 km (6,000 miles) or annually, whichever comes first. Refer to manual for exact specification.
Valve Adjustment Interval:
Typically around 20,000 km (12,000 miles) or as specified in the manual for clearance checks and adjustments.
Spark Plug Replacement:
Intervals vary; check manual for recommendations (e.g., 20,000-40,000 km).
Brake Fluid:
DOT 4 or DOT 5.1 (refer to manual for exact specification and change interval).
Coolant Capacity:
N/A (Air-cooled)
Final Drive Oil Capacity:
Refer to manual for capacity and specific fluid type (likely SAE 90 gear oil).
Common Wear Items:
Clutch wear, wheel bearings, steering head bearings, fork seals due to mileage and usage.
Electrical Gremlins:
Older bikes can develop intermittent electrical faults; systematic diagnosis using wiring diagrams is crucial.
Fuel System Maintenance:
Periodic cleaning of fuel injectors or carburetors, checking fuel filter.
Tire Pressure Front:
Refer to manual and tire manufacturer's recommendations (typically around 2.5 bar / 36 psi).
Tire Pressure Rear:
Refer to manual and tire manufacturer's recommendations (typically around 2.8 - 2.9 bar / 40-42 psi when solo).
