🏷️ Basic Information

Make:

BMW

Model:

R 80 / R 100

Model Variants Covered:

R 80, R 100 (specific sub-variants like GS, R, RT may be detailed within)

Engine Codes:

Various boxer twin engine codes specific to R 80 and R 100 models (e.g., Type 248 for R80, Type 247 for R100 variants)

👋 Introduction

Vehicle Segment:

Motorcycle (Touring, Sport Touring, Adventure Touring)

Target Audience:

Enthusiast owners, independent repair shops, BMW dealerships

Competitors:

Honda Gold Wing, Yamaha FJR1300, Kawasaki Concours, Moto Guzzi California (depending on specific variant and era)

Powertrain Layout:

Air-cooled, horizontally opposed twin-cylinder (Boxer) engine

Drivetrain:

Shaft drive

Design Philosophy:

Robust engineering, long-distance touring capability, distinctive BMW boxer character

📋 Manual Details

Market Focus:

Global (primarily Europe and North America)

Language:

English

Documentation Type:

Factory Service Repair Manual

Estimated Pages:

Approximately 500-800+ pages (typical for comprehensive factory manuals)

Manual Type:

Service and Repair Manual

Language Details:

Comprehensive English technical documentation

Digital Format:

PDF

📖 Manual Coverage

Engine Mechanical:

Engine assembly, disassembly, overhaul, component specifications, timing, valve adjustments, lubrication systems

Fuel System:

Carburetor(s) (e.g., Bing), fuel pump, fuel lines, fuel tank, fuel filters, fuel injection (if applicable to specific late models)

Ignition System:

Ignition coils, spark plugs, ignition control unit, timing, wiring diagrams

Exhaust System:

Mufflers, exhaust pipes, catalytic converters (if applicable), mounting hardware

Transmission Drivetrain:

Gearbox overhaul, clutch service, final drive, driveshaft, universal joints

Suspension:

Front forks (telescopic, possibly leading-link for some models), rear shock absorbers, swingarm, bearings, adjustments

Brakes:

Hydraulic brake systems, calipers, master cylinders, brake lines, pads, discs, bleeding procedures

Electrical System:

Wiring diagrams, lighting, starter motor, alternator, battery, fuses, switches, instrumentation

Chassis Frame:

Frame inspection, welding, steering head bearings, fasteners

Bodywork Fairings:

Tank, seat, fenders, fairings (if equipped), trim components, mounting, removal/installation

Wheels Tires:

Wheel bearings, rim maintenance, tire mounting/balancing, spokes

Preventative Maintenance:

Regular service checks, lubrication, adjustments, filter replacements

Troubleshooting Diagnostics:

Fault finding charts, symptom analysis, diagnostic procedures for all systems

Repair Overhaul:

Step-by-step instructions for component removal, repair, and reassembly

Specifications Data:

Torque values, clearances, fluid capacities, electrical resistance, engine performance data

Wiring Diagrams:

Detailed electrical schematics for all systems

Depth Level:

Comprehensive (covering from basic maintenance to complete engine and gearbox rebuilds)

Detail Level:

Factory-level detail with exploded views, diagrams, and precise specifications

📊 Manual Specifications

File Type:

Portable Document Format (PDF)

Searchability:

Text-searchable (typically)

Print Readability:

High-resolution scans suitable for printing or digital viewing

Binding:

N/A (Digital PDF)

Paper Quality:

N/A (Digital PDF)

⚙️ Engine Specifications

Engine Type:

Four-stroke, Boxer Twin

Displacement R80:

797.5 cc (for R 80 variants)

Displacement R100:

980 cc (for R 100 variants)

Bore Stroke R80:

82.5 mm x 74.5 mm (typical for R80)

Bore Stroke R100:

94 mm x 70.7 mm (typical for R100)

Cooling System:

Air-cooled

Valve Train:

Overhead camshaft (OHC), pushrod operated valves

Horsepower R80:

Approx. 50-60 hp (depending on variant and tuning)

Horsepower R100:

Approx. 65-70 hp (depending on variant and tuning)

Torque R80:

Approx. 55-60 Nm (depending on variant)

Torque R100:

Approx. 70-75 Nm (depending on variant)

Fuel Delivery:

Dual Bing carburetors (e.g., 32mm or 40mm depending on model)

Fuel Type:

Unleaded gasoline (87 AKI / 91 RON minimum)

Fuel Capacity:

Typically 18-23 liters (4.75-6.0 gallons)

🔧 Transmission

Transmission Type:

5-speed manual gearbox

Clutch Type:

Single dry plate clutch (mechanically actuated)

Final Drive:

Shaft drive with universal joint

Gear Ratios:

Specific gear ratios detailed in the manual for each model variant

📐 Dimensions

Wheelbase:

Varies by model, typically around 1400-1450 mm (55-57 inches)

Seat Height:

Varies by model, typically around 780-820 mm (30.7-32.3 inches)

Dry Weight:

Varies by model, typically around 200-230 kg (440-507 lbs)

Gross Vehicle Weight Rating:

Varies by model, typically around 400-450 kg (880-992 lbs)

🛡️ Safety Features

Safety Standards:

Meets relevant national and international motorcycle safety standards of the period

Braking System:

Hydraulic disc brakes front and rear (often dual discs front on R100 models)

Lighting:

Halogen headlamp, taillight, turn signals

Frame Construction:

Steel tubular frame for rigidity and rider protection

💡 Technology Features

Infotainment System:

N/A (Basic motorcycle design of the era)

ABS:

Optional ABS on some later R100 models (e.g., R100RT)

Connectivity Features:

N/A (No modern connectivity features)

🔧 Maintenance

Oil Change Interval:

Typically every 5,000 - 10,000 km (3,000 - 6,000 miles) or annually

Valve Adjustment Interval:

Every 10,000 - 15,000 km (6,000 - 9,000 miles)

Major Service:

Recommended every 20,000 - 40,000 km (12,000 - 24,000 miles) for comprehensive checks and component replacements

Engine Oil Type:

SAE 20W-50 or 10W-40 API SG or higher (refer to manual for exact specification and gearbox oil type)

Engine Oil Capacity:

Approx. 2.5-3.0 liters (2.6-3.2 quarts) depending on model and oil filter change

Transmission Oil Type:

Gear oil SAE 75W/90 (API GL-5) or specific BMW recommendation

Brake Fluid Type:

DOT 4 hydraulic brake fluid

Common Wear Items:

Clutch wear, rear main seal leaks, steering head bearing wear, fork seal leaks

Electrical Gremlins:

Intermittent electrical faults often related to aging wiring connectors or grounds

Carburetor Tuning:

Bing carburetors require periodic synchronization and adjustment for optimal performance

Oil Filter Part Number:

Examples: Mann-Filter MF 1004, K&N KN-103 (verify exact fitment via manual or parts catalog)

Spark Plug Part Number:

Examples: NGK BPR6ES, Bosch W8AC (verify exact fitment)

📚 Vehicle History

Brand Legacy:

BMW Motorrad's long history of engineering excellence, particularly with boxer engines and shaft drive

Heritage Lineage:

Direct descendants of earlier R-series models, evolving through the 70s and 80s with technological updates

Generation Covered:

These models represent the later iterations of the air-cooled boxer twins before the introduction of the R1100 oil-cooled series

Production Period Overlap:

While the manual covers 1999-2008, the R 80 and R 100 platform itself had a much longer production life, with these years indicating the availability of updated service information or specific market models.

Manufacturing Location:

Germany (BMW Motorrad factories)

🏆 Awards & Recognition

Industry Reputation:

Renowned for durability, reliability, and excellent touring comfort, often considered 'classics' in the motorcycle world.

Reliability Perception:

High, especially when properly maintained according to factory specifications detailed in this manual.