🏷️ Basic Information

Make:

BMW

Model:

R Series (R80, R90, R100)

Model Variant:

GS

Engine Code Range:

Derived from R80, R90, R100 series engines

👋 Introduction

Target Audience:

BMW R-series motorcycle owners, DIY mechanics, and professional workshops

Value Proposition:

Comprehensive, detailed, and easily accessible digital resource for maintaining and repairing iconic BMW GS models

Illustrations:

Detailed illustrations, exploded diagrams, drawings, and photos

Explanations:

Simple, step-by-step explanations for complex procedures

Data Inclusion:

Service data, specifications, tightening torques, wear limits, precautions

📋 Manual Details

Applicable Years:

1978-1996

Page Count:

167

Manual Type:

Workshop Service Repair Manual

Language:

English

File Format:

PDF

Download Type:

Instant Download

📖 Manual Coverage

Engine:

Complete disassembly, assembly, troubleshooting, maintenance, and repair of all R-series boxer twin engines (R80, R90, R100 variants)

Transmission:

Repair, adjustment, and maintenance of the 5-speed gearbox

Drivetrain:

Final drive, driveshaft, clutch service and repair

Suspension:

Front fork (BMW Telelever/Monolever, depending on exact model year within range) and rear swingarm/shock absorber service and adjustment

Brakes:

Front and rear brake system maintenance, caliper overhaul, fluid replacement, and adjustment

Electrical:

Wiring diagrams, starter system, charging system (alternator, regulator), ignition system, lighting, and instrumentation

Fuel System:

Carburetor service, tuning, fuel pump operation, and tank maintenance

Bodywork And Chassis:

Frame inspection, body panel removal/installation, seat, fairing, and luggage system servicing

Maintenance:

Scheduled maintenance, oil changes, filter replacements, spark plug service, brake bleeding, chain/drive lubrication, valve clearance adjustment

Troubleshooting:

Systematic diagnosis and resolution of common mechanical and electrical issues

Repair:

Detailed step-by-step instructions for component removal, disassembly, cleaning, inspection, repair, reassembly, and installation

Adjustments:

Carburetor synchronization, ignition timing, clutch play, brake lever free play, suspension sag

Diagnostic Capabilities:

Advanced diagnostic procedures, symptom-based troubleshooting guides, and electrical system analysis

Rebuild Procedures:

Comprehensive engine rebuild, transmission overhaul, and suspension component rebuilding instructions

Special Tools:

Identification and usage instructions for specialized BMW service tools required for specific procedures

📊 Manual Specifications

PDF Quality:

High-resolution, all pages printable

Printability:

Yes, all 167 pages are printable

Binding Type:

N/A (Digital PDF)

Paper Type:

N/A (Digital PDF)

Required Software:

Adobe Reader

Operating Systems:

Windows, Mac, and Linux OS

⚙️ Engine Specifications

Engine Type:

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

Displacement Variants:

Approximately 797cc (R80), 897cc (R90), and 980cc/1000cc (R100)

Horsepower Range:

Typically 50-65 hp depending on model and configuration

Torque Range:

Typically 60-75 Nm depending on model and configuration

Carburetor Types:

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

Ignition System:

Breakerless electronic ignition (later models) or contact breaker ignition (earlier models)

🔧 Transmission

Transmission Type:

5-speed manual gearbox

Clutch:

Single dry plate diaphragm spring clutch

📐 Dimensions

Dry Weight Approximate:

Ranging from approximately 200-220 kg depending on model and equipment

🛡️ Safety Features

Braking System:

Disc brakes (typically single front disc on R80/R90, dual front discs on some R100 models), rear drum or disc brake depending on year.

Frame Construction:

Steel tube frame offering robustness and stability

💡 Technology Features

Infotainment Systems:

N/A (Focus on mechanical and electrical systems of the era; basic analog instrumentation)

Driver Assistance Features:

N/A (No electronic rider aids beyond standard braking and lighting)

Connectivity Options:

N/A (No integrated electronic connectivity)

🔧 Maintenance

Oil Change Interval:

Typically every 5,000-10,000 km or annually, refer to specific model chart within manual

Valve Adjustment Interval:

Typically every 10,000-20,000 km

Engine Oil Grade:

Multi-viscosity oil, typically SAE 20W-50 or 15W-50 (mineral or synthetic), refer to manual for exact specifications

Transmission Oil Type:

Gear oil, e.g., SAE 80W/90 GL-5, refer to manual for exact specifications

Final Drive Oil Type:

Gear oil, e.g., SAE 80W/90 GL-5, refer to manual for exact specifications

Brake Fluid Type:

DOT 4 (or DOT 3 for older systems), refer to manual for exact specifications

Common Wear Items:

Clutch wear, final drive spline lubrication, output shaft seal leaks, carburetor float bowl issues, steering head bearing adjustment

Electrical Concerns:

Aging wiring insulation, regulator/rectifier failures (depending on system), ignition coil issues

📚 Vehicle History

Bmw Motorrad Legacy:

BMW Motorrad's long-standing reputation for engineering excellence, durability, and rider comfort, particularly with its boxer-twin engine platform.

Gs Lineage:

The GS ('Gelände/Straße' - off-road/road) models represent BMW's pioneering effort in the adventure touring motorcycle segment, offering versatility for both on-road and light off-road use.

Production Period Covered:

1978 to 1996, encompassing significant updates and refinements to the R-series platform.

🏆 Awards & Recognition

Brand Recognition:

BMW's R-series motorcycles are widely recognized for their durability, reliability, and long-term ownership satisfaction.

Owner Satisfaction:

Consistently high owner satisfaction ratings for longevity and capability.