🏷️ Basic Information Identification Make: BMW Model: R Series (R80, R90, R100) Manufacturer Code: BMW Motorrad Generation Covered Production Years: 1978-1996 Codes Chassis Codes Covered: R80/7, R80GS, R80RT, R90/6, R90S, R100/7, R100S, R100RT, R100RS, R100GS, R100R, R100CS, R100T 👋 Introduction Market Position Segment: Premium/Classic Motorcycle Segment Target Audience: Owners, enthusiasts, independent repair shops specializing in vintage BMW motorcycles Competitive Analysis Competitors Manuals: Haynes, Clymer, factory service manuals (often rare and expensive) Advantage: Comprehensive coverage across multiple models and years in a single, accessible format Key Features Illustration Quality: Illustrated with clear, step-by-step instructions Completeness: Offers complete service, repair, and diagnostic information Accessibility: Digital format allows for instant download and easy searchability 📋 Manual Details Coverage Areas Engine Overhaul: Complete Transmission Repair: Complete Electrical System Diagnostics: Comprehensive Chassis And Suspension: Complete Bodywork And Trim: Detailed Troubleshooting Guides: Extensive Page Count Estimated Page Count: 400-600 (Varies by specific model and edition) Manual Type Type: Service Repair Workshop Manual Language Language: English Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Engine: BMW Boxer twin-cylinder, air-cooled (2-valve and 4-valve variants where applicable) Fuel System: Carburetor systems (Bing), fuel injection systems (Motronic where applicable) Ignition System: Breaker-point ignition, electronic ignition systems Transmission: 5-speed and 4-speed manual gearboxes, clutch systems (dry single-plate and dual-plate) Drivetrain: Shaft drive, final drive units Brakes: Drum brakes, disc brakes (single and dual front discs), braking system hydraulics Suspension: Telescopic forks,モノショック (Monolever, Paralever) rear suspension systems Electrical System: Wiring diagrams, lighting, starting system, charging system (alternator, regulator), instrumentation Frame And Bodywork: Frame inspection and repair, body panels, fuel tank, seat, fairings (where applicable) Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug service, brake adjustments, chain/shaft lubrication Engine Rebuild: Piston and cylinder removal/installation, valve adjustments, crankshaft and connecting rod service, seal replacement Transmission Rebuild: Gearbox disassembly and reassembly, bearing replacement, shift mechanism repair Carburetor And Fuel Injection Tuning: Adjustment, cleaning, rebuilding, synchronization Electrical Diagnostics: Troubleshooting starting and charging issues, wiring harness repair, component testing Suspension Service: Fork seal replacement, shock absorber service, linkage maintenance Brake System Service: Bleeding, pad/shoe replacement, caliper/master cylinder rebuilding Wheel And Tire Service: Tire replacement, wheel balancing, spoke tensioning (where applicable) Troubleshooting Charts: Common symptoms and their causes, diagnostic steps Technical Depth Level Of Detail: In-depth, suitable for professional mechanics and experienced DIY enthusiasts Diagnostic Information: Includes specific diagnostic procedures, torque specifications, and troubleshooting flowcharts Rebuild Procedures: Detailed steps for complete engine, transmission, and component overhauls Wiring Diagrams: Clear, comprehensive wiring schematics for all electrical systems Special Tools: Lists and descriptions of specialized tools required for certain procedures 📊 Manual Specifications File Format Format Type: Portable Document Format (PDF) Searchability: Searchable text for quick information retrieval Resolution: High resolution, clear images and diagrams Print Quality Printability: Printable for offline use, individual chapters or full manual Binding Type Binding Digital: N/A (Digital Download) Paper Type Paper Digital: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Configuration: Air-cooled, four-stroke, boxer twin-cylinder Engine Displacement R80: 797.5 cc (for R80 models) Engine Displacement R90: 897.1 cc (for R90/6 and R90S) Engine Displacement R100: 979.7 cc (for R100 models) Valve Train: Overhead valves, pushrod actuated (2-valve typically), some R100 variants featured 4-valve heads Performance Horsepower R80: Approx. 50-60 hp (varies by specific R80 model and tuning) Horsepower R90: Approx. 60-67 hp (R90S typically higher) Horsepower R100: Approx. 65-70 hp (varies by specific R100 model and tuning) Torque: Significant low-end torque characteristic of BMW boxer engines Fuel System Carburetors R80 R90: Dual Bing 32mm or 40mm constant-velocity carburetors (e.g., 64/32/17-19) Carburetors R100: Dual Bing 32mm or 40mm CV carburetors (e.g., 64/40/301) Fuel Injection Systems: Bosch Motronic (on later R100 models) Fuel Type: Unleaded gasoline, Octane rating 90-95 RON (Research Octane Number) 🔧 Transmission Standard Type R80 R90: 5-speed constant mesh manual gearbox Type R100: 5-speed constant mesh manual gearbox (some earlier R100 models may have had 4-speed) Optional Gearbox Variants: Some variations in gear ratios across different models and years Features Clutch Type: Dry single-plate diaphragm spring clutch (most models); some high-performance variants (like R90S) may have had dual-plate options. Final Drive: Enclosed shaft drive with hypoid bevel gear final drive 📐 Dimensions Exterior Wheelbase: Approx. 1450-1500 mm (varies by model) Seat Height: Approx. 780-820 mm (varies by model) Weights Dry Weight: Approx. 200-230 kg (varies significantly by model and equipment) Gross Vehicle Weight Rating: Approx. 400-430 kg (varies by model) 🛡️ Safety Features Ratings Crash Test Data: Not applicable in the same way as modern cars; safety focused on rider control and braking performance. Active Features Braking System: Dual disc front brakes (on many later models), single disc rear or drum brakes, providing effective stopping power. Suspension Stability: Well-engineered suspension systems (Monolever, Paralever) contribute to stability and handling. Passive Features Frame Integrity: Robust steel tube frame provides a strong and stable chassis. Lighting: Adequate headlight, taillight, and indicator lighting for...