Model:
R Series (R80, R90, R100)
Model Variants:
R80/7, R80GS, R80ST, R90/6, R90S, R100/7, R100GS, R100RS, R100RT, R100S, R100T
Production Years Covered:
1978-1996
Engine Code Designation:
M (Motor) followed by series and capacity (e.g., M100)
Chassis Code Designation:
Often model specific, e.g., R100RS, R80GS
Positioning:
Essential resource for owners and technicians maintaining BMW's iconic airhead boxer motorcycles.
Competitors:
Haynes, Clymer, Bentley manuals for specific models (though this covers a broad range).
Value Proposition:
Covers multiple popular models and an extensive year range, providing significant cost savings over individual factory manuals.
Illustration Quality:
Described as 'clear', implying good quality diagrams and photographs.
Coverage:
Comprehensive service and repair for BMW R80, R90, and R100 series motorcycles from 1978 to 1996.
Estimated Page Count:
Detailed manual, precise page count not specified but expected to be substantial for full coverage.
Type:
Service Repair Manual (Downloadable File)
Language:
English (implied by product description)
Format:
Digital Download (PDF or similar)
Engine:
Engine overhaul, tuning, component diagnosis, valve adjustments, carburetor service, ignition system, lubrication.
Transmission:
Gearbox disassembly, assembly, troubleshooting, clutch service, final drive maintenance.
Chassis:
Frame inspection, steering head bearing service, swingarm lubrication, shaft drive maintenance.
Suspension:
Front fork service (including seals and oil), rear shock absorber maintenance and replacement.
Brakes:
Brake caliper service, master cylinder overhaul, brake fluid replacement, disc and pad inspection.
Electrical:
Wiring diagrams, lighting system, charging system (alternator, voltage regulator), starter motor, battery maintenance, instrument cluster.
Fuel System:
Fuel tank maintenance, fuel lines, fuel pump (if applicable), carburetor adjustment and cleaning (Bing carburetors common).
Exhaust System:
Exhaust pipe and muffler inspection, gasket replacement.
Bodywork:
Fender removal and installation, seat servicing, fairing (if equipped) maintenance.
Maintenance:
Routine servicing, oil changes, filter replacements, spark plug changes, lubrication points.
Troubleshooting:
Diagnostic procedures for common engine, electrical, and mechanical faults.
Repair:
Detailed step-by-step instructions for component removal, repair, and reinstallation.
Rebuilds:
Engine rebuild procedures, including piston ring replacement, bearing services, and cylinder head work.
Diagnostics:
Fault finding charts, symptom-based troubleshooting, electrical system diagnostics.
Depth:
Comprehensive, covering routine maintenance, advanced diagnostics, and complete engine/transmission rebuilds.
Detail Level:
Illustrated with clear diagrams and specifications for expert and advanced DIY mechanics.
Format:
Digital Download (likely PDF)
Searchability:
Likely searchable text if a properly OCR'd PDF.
Quality:
Digital, quality depends on source scan. Expect clear illustrations.
Binding:
Not Applicable (Digital Format)
Paper:
Not Applicable (Digital Format)
Type:
Air-cooled, four-stroke, boxer-twin cylinder engine.
Displacement Variants:
R80: ~797cc, R90: ~897cc, R100: ~980cc to 1000cc.
Valve Train:
Overhead valves operated by pushrods and rocker arms.
Cooling System:
Air-cooled.
Horsepower Range:
Approximately 50 hp to 70 hp depending on model and year.
Torque Range:
Approximately 60 Nm to 80 Nm depending on model.
Carburetors:
Typically dual Bing constant-velocity carburetors (e.g., 32mm or 40mm).
Fuel Type:
Unleaded gasoline (91+ octane recommended).
Fuel Capacity:
Typically 18-24 liters (4.75-6.3 US gal) depending on tank size.
Type:
5-speed manual transmission.
Drive System:
Shaft drive to rear wheel.
Type:
Not applicable (all standard models)
Clutch:
Dry single-plate clutch (operated by cable).
Final Drive Fluid:
Typically SAE 90 Hypoid Gear Oil.
Wheelbase:
Varies by model, generally around 1450-1500 mm (57-59 inches).
Seat Height:
Varies by model, typically 750-850 mm (29.5-33.5 inches).
Dry Weight:
Approximately 190-230 kg (419-507 lbs) depending on model.
Gross Vehicle Weight Rating:
Typically around 370-400 kg (815-882 lbs).
Crash Test Data:
Not applicable for this era of motorcycle; safety focused on rider protection and machine stability.
Braking System:
Disc brakes front and rear, often dual discs on the front for later/performance models.
Suspension Stability:
Well-regarded chassis and suspension design for its time, contributing to stable handling.
Lighting:
Halogen headlamp, taillight, and indicator lights.
Features:
Basic instrument cluster: speedometer, tachometer, odometer, gear indicator (on some models), warning lights.
Features:
Not applicable (motorcycle).
Features:
Not applicable (motorcycle).
Oil Change:
Typically every 5,000-10,000 km (3,000-6,000 miles) or annually.
Valve Adjustment:
Every 10,000-20,000 km (6,000-12,000 miles).
Spark Plugs:
Check and clean/gap at oil changes, replace every 20,000-40,000 km (12,000-24,000 miles).
Engine Oil:
SAE 20W-50 or SAE 10W-40 motorcycle specific oil (refer to manual for precise recommendations based on climate).
Brake Fluid:
DOT 3 or DOT 4 brake fluid.
Final Drive Fluid:
SAE 90 Hypoid Gear Oil.
Fork Oil:
Specific weight fork oil (e.g., 15W), quantity per leg specified in manual.
Common Problems:
Oil leaks (especially from the front crankshaft seal and pushrod tubes), electrical connector corrosion, final drive splines wear, clutch actuation issues.
Common Problems Continued:
Carburetor synchronization and jetting issues, aging rubber components (hoses, seals), starter motor solenoid failure.
Legacy:
BMW Motorrad has a long history dating back to the early 20th century, known for engineering and durability.
Airhead Era:
These models represent the pinnacle of BMW's air-cooled boxer engine development, affectionately known as 'airheads'.
Key Innovations:
Shaft drive, boxer engine layout, and robust construction became BMW hallmarks.
Manufacturing Location:
Berlin, Germany.
Significance:
These models were built for touring, commuting, and adventure, proving their versatility and longevity.
