🏷️ Basic Information

Make:

BMW

Model:

R100

Year:

1990

Product Type:

Full Service Repair Manual

👋 Introduction

Vehicle Segment:

Classic Airhead Boxer Motorcycle

Target Audience:

BMW R100 owners, enthusiasts, and independent repair shops

Manual Competitors:

Aftermarket Haynes/Clymer manuals (often less detailed for specific factory procedures)

Authenticity:

Based on original BMW factory documentation for unparalleled accuracy

Completeness:

Covers all aspects of repair, maintenance, and diagnostics

Clarity:

Includes detailed diagrams, illustrations, and step-by-step instructions

Troubleshooting:

Essential resource for diagnosing and resolving common and complex issues

📋 Manual Details

Engine Overhaul:

Comprehensive

Transmission Repair:

Detailed

Electrical System Diagnostics:

Extensive

Chassis And Suspension:

Thorough

Brake System Maintenance:

Complete

Bodywork And Frame:

Included

Troubleshooting Guides:

Extensive

Estimated Pages:

400+

Type:

Factory Service Manual / Repair Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Engine Mechanical:

Cylinder heads, cylinders, pistons, crankshaft, camshaft, valve train, timing

Engine Management:

Ignition system, fuel injection system (Bosch Motronic), sensors, ECU diagnostics

Fuel System:

Fuel pump, fuel lines, fuel injectors, fuel tank, fuel pressure regulator

Cooling System:

Oil cooler, oil circulation, oil filter replacement

Exhaust System:

Exhaust pipes, mufflers, catalytic converter (if applicable)

Transmission:

Gearbox disassembly, assembly, gear selection, clutch operation

Drivetrain:

Driveshaft, final drive, universal joints

Suspension:

Front forks (telescopic), rear swingarm, shocks, springs, linkage

Steering:

Handlebars, steering head bearings, linkage

Brakes:

Front and rear disc brakes, brake calipers, master cylinders, brake lines, fluid replacement

Electrical System:

Wiring diagrams, battery, starter, alternator, lighting, ignition coil, fuses, relays

Instrumentation:

Speedometer, tachometer, indicator lights, warning lamps

Bodywork:

Fairing, fuel tank, seat, fenders, side covers, frame components

Wheels And Tires:

Wheel bearings, tire pressure, tire replacement

Routine Maintenance:

Oil changes, filter replacements, spark plug servicing, lubrication points, chain adjustment (if applicable)

Diagnostic Procedures:

Troubleshooting charts, symptom-based diagnostics, electrical system testing

Repair And Rebuild:

Engine rebuilds, transmission overhauls, suspension component replacement, brake caliper rebuilds

Adjustment Procedures:

Valve clearance adjustment, carburetor synchronization (if applicable), idle speed adjustment

Disassembly And Assembly:

Step-by-step instructions for all major components

Depth:

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

Detail Level:

Detailed torque specifications, clearances, tolerances, and tightening sequences

Diagnostic Information:

Specific diagnostic trouble codes (DTCs) and their resolution steps for Motronic system

Wiring Diagrams:

High-quality, legible wiring schematics for all electrical systems

📊 Manual Specifications

Format:

PDF

Searchability:

Fully searchable text content

Resolution:

High-resolution scans for clear text and diagrams

Printability:

Printable on standard home or office printers

Binding:

N/A (Digital PDF)

Paper Type:

N/A (Digital PDF)

⚙️ Engine Specifications

Engine Type:

Air-cooled, four-stroke, horizontally opposed twin-cylinder (Boxer)

Displacement:

980 cc (980 cubic centimeters)

Bore X Stroke:

94 mm x 70.6 mm (approximate)

Compression Ratio:

8.5:1 (typical)

Valve Train:

Overhead valves (OHV), pushrod actuated

Horsepower:

Approx. 65 hp @ 6500 rpm (varies slightly by specific R100 variant)

Torque:

Approx. 75 Nm @ 5000 rpm (varies slightly by specific R100 variant)

Fuel Delivery:

Bosch LE-Jetronic or Motronic fuel injection

Fuel Type:

Unleaded gasoline (minimum 91 RON/87 AKI recommended)

Ignition Type:

Electronic ignition (Motronic)

🔧 Transmission

Transmission Type:

5-speed constant mesh gearbox

Optional Gearbox:

N/A (5-speed was standard across R100 models)

Clutch Type:

Single dry plate, diaphragm spring clutch

Final Drive:

Shaft drive to rear wheel

Gearbox Oil Type:

SAE 80W-90 hypoid gear oil (API GL-5)

Gearbox Oil Capacity:

Approx. 1.2 liters (refer to manual for exact fill level)

📐 Dimensions

Length:

Approx. 2180 mm (R100RS/RT)

Width:

Approx. 850 mm (handlebar width)

Height:

Approx. 1240 mm (R100RT)

Dry Weight:

Approx. 207 kg (R100RT)

Gross Vehicle Weight Rating:

Approx. 395 kg

🛡️ Safety Features

Safety Standards:

Meets contemporary European and US safety standards for motorcycles of its era

Braking System:

Dual front disc brakes, single rear disc brake

Suspension Stability:

Well-engineered suspension for predictable handling

Frame Construction:

Robust steel tubular frame providing structural integrity

Lighting:

Halogen headlamp, integrated turn signals and taillight

💡 Technology Features

Infotainment System:

N/A (Focus on mechanical and electrical systems, not modern infotainment)

Driver Assistance Features:

N/A (No electronic driver assistance systems typical of modern vehicles)

Connectivity Options:

N/A (No Bluetooth, USB, or Wi-Fi connectivity)

Fuel Injection System:

Bosch Motronic electronic fuel injection and ignition management system.

Diagnostic Interface:

Provides diagnostic information via specific test connectors and procedures, as detailed in the manual.

🔧 Maintenance

Oil Change Interval:

Every 5,000 - 7,500 km or annually (refer to manual for specific conditions)

Valve Adjustment Interval:

Every 10,000 - 15,000 km

Spark Plug Replacement:

Every 10,000 - 15,000 km

Brake Fluid Flush:

Every 2 years

Engine Oil Type:

SAE 20W-50 or 10W-40 motorcycle-specific oil (API SG or higher recommended). Refer to manual for exact ambient temperature suitability.

Engine Oil Capacity:

Approx. 2.75 liters (with filter change)

Brake Fluid Type:

DOT 4 hydraulic brake fluid

Final Drive Oil:

SAE 80W-90 hypoid gear oil (API GL-5)

Final Drive Oil Capacity:

Approx. 0.25 liters

Common Issues:

Sticking exhaust valve guides, oil leaks (particularly around pushrod tubes and base gasket), starter motor issues, clutch slave cylinder leaks.

Preventative Maintenance:

Regular valve clearance checks, timely oil changes with correct specification oil, and diligent inspection for oil leaks are crucial.

📚 Vehicle History

Bmw Motorrad Legacy:

BMW Motorrad, renowned for precision engineering, durability, and boxer engine technology since the early 20th century.

R100 Lineage:

The R100 series represents the evolution of BMW's long-standing airhead boxer platform, building upon the R50, R60, R75, R80, and R90 series. It introduced updated fuel injection and electronic ignition across various models like the R100RS, R100RT, R100GS, and R100R.

Production Period:

The R100 series was produced from the late 1970s through the mid-1990s. The 1990 model falls within the later, more refined iterations of the platform.

Manufacturing Location:

Berlin, Germany (BMW Motorrad Plant)

🏆 Awards & Recognition

Motorcycle Awards:

While specific awards for the 1990 R100 may not be individually cataloged, the R100 series is widely recognized within the motorcycle community for its durability, touring capability, and enduring design.

Reliability Reputation:

Generally considered highly reliable and durable when properly maintained, earning a strong reputation for longevity.

Certification Standard:

Meets all applicable emissions and safety certifications for its production year.