🏷️ Basic Information

Make:

BMW

Model:

R850C / R1200C

Product Type:

Repair Service Manual

Engine Codes:

R850C: Typically designated as Boxer 2V (2-valve per cylinder) engine. R1200C: Also Boxer 2V engine. Specific engine codes can be found in the manual.

👋 Introduction

Target Audience:

Owners of BMW R850C and R1200C motorcycles seeking to perform maintenance, repairs, and diagnostics

Motorcycle Segment:

Cruiser/Touring

Manual Value Proposition:

Provides detailed, model-specific guidance for complex BMW Boxer engine and chassis systems, often surpassing generic motorcycle repair manuals in accuracy and completeness.

Manufacturer Documentation:

Based on official BMW service data, ensuring accuracy for specialized procedures and specifications.

Model Variations:

The R850C and R1200C share many components but differ in engine size and output, requiring specific attention to model-specific details within the manual.

📋 Manual Details

Coverage Areas:

Engine, Engine Electrics, Fuel System, Exhaust System, Clutch, Transmission, Front Forks, Steering, Rear Wheel Drive, Brake System, Wheel and Tires, Frame, Equipment, Seat, Electrical Equipment, Instruments, Lights

Model Years Covered:

Covers the production life cycle of the R850C and R1200C models (typically from inception to the end of their production runs, exact years depend on the specific manual's publication date).

Manual Type:

Service Manual / Repair Manual

Language:

English

Format:

Likely PDF or Digital Download (as common for aftermarket service manuals)

📖 Manual Coverage

Engine Systems:

Cooling (Air/Oil), Lubrication, Fuel Delivery, Ignition, Valve Train, Crankshaft and Connecting Rods, Pistons and Cylinders, Engine Disassembly and Reassembly, Torque Specifications, Seals and Gaskets

Drivetrain Systems:

Clutch Operation and Service, Transmission Gearbox Maintenance and Repair, Final Drive and Shaft Drive Servicing, Differential (if applicable, though less common for these models)

Suspension Steering:

Front Fork Overhaul and Adjustment, Steering Head Bearing Service, Rear Shock Absorber and Suspension Linkage Maintenance

Braking Wheels Tires:

Brake System Diagnosis and Repair (Hydraulic and Mechanical Components), Brake Pad and Rotor Replacement, Wheel Bearing Service, Tire Inspection and Replacement, Wheel Balancing

Electrical Systems:

Wiring Diagrams, Battery Maintenance, Charging System (Alternator/Generator), Starter Motor, Lighting Circuits, Instrument Cluster Functionality, Ignition System Components

Chassis Bodywork:

Frame Integrity Checks, Seat Removal and Installation, Fairing and Body Panel Service, Exhaust System Maintenance and Repair

Fuel System:

Fuel pump, injectors, fuel pressure regulator, fuel filter, throttle bodies, electronic fuel injection (EFI) control unit (ECU) troubleshooting and service.

Exhaust System:

Exhaust pipes, mufflers, catalytic converter (if applicable), oxygen sensors, and mounting hardware inspection and repair.

Frame Components:

Frame integrity checks, swingarm pivot, steering head bearings, and related structural components.

Equipment Accessories:

Details on optional equipment installation and maintenance, such as luggage systems, seats, and fairings.

Maintenance Procedures:

Scheduled Maintenance Intervals, Oil and Filter Changes, Air Filter Replacement, Spark Plug Service, Valve Clearance Adjustment, Brake Fluid Flush and Bleed, Coolant System Checks

Repair Procedures:

Engine Overhaul and Rebuild, Transmission Rebuild, Suspension Component Replacement, Electrical Component Troubleshooting and Replacement, Fuel System Cleaning and Repair, Brake System Overhaul

Troubleshooting:

Diagnostic procedures for common malfunctions, Fault code interpretation (if applicable), Symptom-based troubleshooting guides

Component Removal Installation:

Step-by-step guides for removing and reinstalling major components like engine, gearbox, suspension, wheels, and body panels.

Depth Level:

Comprehensive (from basic maintenance to complete engine and component rebuilds)

Diagnostic Tools:

May include information on diagnostic connectors and basic diagnostic procedures, potentially referencing BMW proprietary tools.

📊 Manual Specifications

File Format:

Likely PDF, potentially with searchable text and high-resolution diagrams

Print Quality:

Assumed high-quality, clear diagrams and legible text

Binding Type:

If printed: Likely spiral-bound or saddle-stitched for ease of use

Paper Type:

If printed: Durable paper stock, likely glossy or semi-gloss for durability in a workshop environment

Schematics Diagrams:

Includes detailed exploded views, wiring diagrams, and troubleshooting flowcharts for comprehensive understanding.

Torque Specifications:

Precise torque values for all critical fasteners, essential for proper assembly and safety.

Illustrations Photos:

Likely contains a substantial number of clear, high-quality illustrations and photographs to guide repair procedures.

⚙️ Engine Specifications

Engine Type:

4-Stroke, Boxer-Twin (Flat-Twin)

Displacement Cc:

848

Cooling System:

Air/Oil Cooled

Bore X Stroke Mm:

Approx. 90.0 x 66.0 (Specific to R850C, to be confirmed in manual)

Compression Ratio:

Approx. 10.0:1 (Specific to R850C, to be confirmed in manual)

Valve Actuation:

Overhead Camshafts (SOHC), Pushrod actuated valves (typical for this era of BMW Boxer)

Engine Type:

4-Stroke, Boxer-Twin (Flat-Twin)

Displacement Cc:

1170

Cooling System:

Air/Oil Cooled

Bore X Stroke Mm:

Approx. 101.0 x 73.0 (Specific to R1200C, to be confirmed in manual)

Compression Ratio:

Approx. 10.0:1 (Specific to R1200C, to be confirmed in manual)

Valve Actuation:

Overhead Camshafts (SOHC), Pushrod actuated valves (typical for this era of BMW Boxer)

Valve Clearance:

To be confirmed in manual. Typically requires shims or adjustment screws on these Boxer engines.

Fuel Delivery System:

Fuel Injection (Bosch Motronic or similar)

Ignition System:

Electronic Ignition (Digital)

Horsepower Hp:

R850C: Approx. 70 HP @ 7000 RPM, R1200C: Approx. 100 HP @ 7500 RPM (Specific values to be confirmed in manual)

Torque Nm:

R850C: Approx. 77 Nm @ 5000 RPM, R1200C: Approx. 110 Nm @ 5750 RPM (Specific values to be confirmed in manual)

🔧 Transmission

Type:

5-Speed Manual Constant Mesh

Clutch Type:

Single Dry Plate Clutch (Hydraulically Actuated)

Gear Ratios:

Specific gear ratios for each gear are detailed in the manual, crucial for performance tuning and diagnosis.

Type:

Shaft Drive

Transmission Oil:

Specific BMW approved gear oil (e.g., SAE 75W-90, to be confirmed in manual)

📐 Dimensions

Wheelbase Mm:

Approx. 1500-1550 (Model dependent, to be confirmed)

Dry Weight Kg:

R850C: Approx. 220 kg, R1200C: Approx. 250 kg (Model dependent, to be confirmed)

🛡️ Safety Features

Braking System:

BMW Motorrad Integral ABS (Anti-lock Braking System) - likely optional on some models/years, standard on others. To be confirmed in manual.

Frame Construction:

Steel Trellis Frame

💡 Technology Features

Instrument Cluster:

Analog speedometer and tachometer, with LCD display for odometer, trip meters, clock, gear indicator, and warning lights. Fuel gauge typically present.

ABS:

Integral ABS (Anti-lock Braking System) available, significantly enhancing braking safety. Manual details its operation and maintenance.

🔧 Maintenance

Oil Change:

Typically every 10,000 km or 12 months (to be confirmed in manual)

Valve Adjustment:

Typically every 20,000 km (to be confirmed in manual)

Brake Fluid Flush:

Typically every 2 years (to be confirmed in manual)

Engine Oil Type:

Synthetic SAE 20W-50 or 15W-50 (API SG/SH or higher, BMW approved). Specific viscosity based on climate. Manual will specify exact type and capacity.

Brake Fluid Type:

DOT 4 (BMW recommends specific fluid, to be confirmed)

Fork Oil:

Specific grade of suspension fluid (e.g., SAE 7.5W or 10W, to be confirmed in manual)

Common Wear Items:

Clutch plates, brake pads and rotors, steering head bearings, front fork seals, exhaust system mounts.

ABS Maintenance:

Specific procedures for ABS system bleeding and component testing, crucial for safety.

Electrical Gremlins:

Potential for corrosion in connectors or intermittent faults in wiring harnesses, especially on higher mileage units. ABS system issues can occur.

Engine Specific:

While generally robust, specific maintenance as per the manual is crucial for longevity. Oil leaks from seals and gaskets can develop over time.

📚 Vehicle History

Manufacturer:

BMW Motorrad, known for engineering excellence, particularly with its boxer engine motorcycles.

Platform:

The R850C and R1200C are part of BMW's cruiser-style motorcycle line, featuring the iconic boxer engine in a more relaxed riding posture than traditional sportbikes or touring models.

Production Period:

R850C: Circa 1997-2005; R1200C: Circa 1997-2004 (Specific years vary by market, to be confirmed in manual)

🏆 Awards & Recognition

Brand Reputation:

BMW motorcycles consistently receive high marks for build quality, engineering, and rider comfort. The boxer engine platform is a hallmark of the brand.