Model:
R80, R90, R100 Series (Airhead)
Chassis Codes:
R80GS, R80R, R90S, R100GS, R100R, R100RS, R100RT (Specific models vary by year and market, this manual likely covers the range applicable to 1995 models)
Segment:
Iconic large-displacement boxer-twin motorcycles, often classified as touring, sport-touring, or dual-sport (depending on model variant)
Competitors At Time:
Moto Guzzi California series, various Japanese motorcycles (e.g., Honda Gold Wing, Yamaha Venture) in touring segment; smaller dual-sport bikes from Suzuki, Kawasaki in GS variants
Design Philosophy:
Shaft-driven boxer-twin engine, robust construction, comfortable ergonomics, long-distance touring capability, distinctive styling
Manual Utility:
Essential for maintaining the longevity and performance of these classic BMW motorcycles, covering all aspects of repair and maintenance from basic checks to complex engine work.
Coverage Scope:
Comprehensive factory service and repair
Estimated Pages:
Hundreds (specific count not provided, but typical for factory manuals covering multiple models/variants)
Type:
Factory Service Repair Manual
Language:
English (implied by product description, standard for international markets)
Engine:
Full overhaul, top-end rebuild, bottom-end inspection, valve clearance adjustment, carburetor tuning and rebuilding, ignition system troubleshooting, lubrication system service
Transmission And Drivetrain:
Gearbox disassembly and assembly, clutch service, driveshaft maintenance, final drive unit service
Chassis And Suspension:
Front fork service (telescopic, possibly Monolever for GS models), rear suspension (Paralever for GS, Monolever for R models), wheel bearing replacement, steering head bearing adjustment
Brakes:
Front and rear brake caliper service, master cylinder overhaul, brake line replacement, bleeding procedures, ABS system troubleshooting (if applicable to specific 1995 models)
Electrical System:
Wiring diagrams, starter system, charging system (alternator, regulator), battery service, lighting circuits, ignition coils, instrument cluster diagnostics
Fuel System:
Fuel tank maintenance, fuel pump operation (if applicable), fuel lines, carburetor settings (Dell'Orto, Bing), fuel filter replacement
Bodywork And Frame:
Fairing removal and installation, seat maintenance, fender replacement, frame inspection and repair considerations
Maintenance:
Oil changes, filter replacements, spark plug checks, air filter cleaning/replacement, chain adjustment (if applicable, though most were shaft drive), lubrication points
Troubleshooting:
Diagnostic flowcharts for common and uncommon problems, symptom-based repair guidance
Repair:
Step-by-step instructions for component disassembly, repair, and reassembly
Overhaul:
Complete engine and transmission rebuild procedures
Installation:
Guidance for installing new or reconditioned parts
Depth:
Full factory-level detail, covering routine maintenance to complete engine and gearbox overhauls, suitable for professional technicians and experienced enthusiasts
PDF Quality:
Likely high-resolution scans or original digital files, ensuring clarity of text and diagrams
Searchable:
Typically, factory PDF service manuals are searchable by keyword
Printable Pages:
Designed to be printed, allowing users to select and print specific sections or the entire manual
Binding Options:
N/A (Digital PDF format)
Paper Recommendation:
N/A (Digital PDF format)
Type:
Air-cooled, four-stroke, flat-twin (boxer) engine
Displacement R80:
797.5 cc
Displacement R90:
897.1 cc (R90/6, R90S)
Displacement R100:
979.6 cc (R100GS, R100R, R100RS, R100RT)
Bore Stroke R80:
84.8 mm x 70.6 mm
Bore Stroke R90:
90 mm x 70.6 mm
Bore Stroke R100:
94 mm x 70.6 mm
Compression Ratio:
Varies by model and year, typically 8.5:1 to 9.5:1
Horsepower R80:
Approx. 50-55 HP (Varies by tune and model)
Horsepower R90S:
Approx. 67 HP
Horsepower R100:
Approx. 60-70 HP (Varies by model, e.g., R100GS typically 60 HP, R100RS/RT higher)
Torque:
Varies by model and displacement, generally in the 50-70 lb-ft range
Carburetors:
Typically dual Bing or Dell'Orto carburetors (e.g., 32mm or 40mm depending on model)
Fuel Type:
Unleaded gasoline (premium recommended, typically 91-98 octane)
Oil Type:
SAE 20W-40 or SAE 20W-50 Motorcycle Oil (Mineral or Synthetic, check manual for specific viscosity recommendations)
Oil Capacity:
Approx. 2.0 - 2.5 liters (4.2 - 5.3 US quarts), including filter
Type:
Electronic ignition (Breakerless)
Wheelbase:
Varies by model, typically around 1450-1500 mm (57-59 inches)
Dry Weight:
Varies by model, generally 200-230 kg (440-507 lbs)
Wet Weight:
Varies by model, typically 220-250 kg (485-551 lbs)
Features:
Basic instrumentation: speedometer, tachometer, odometer, trip meter, indicator lights. No modern infotainment systems.
Features:
Optional ABS on some later models (e.g., R100GS PD). Primarily mechanical systems.
Oil Change Interval:
Typically every 5,000-7,500 km (3,000-5,000 miles) or annually
Valve Adjustment Interval:
Every 10,000-15,000 km (6,000-10,000 miles)
Gearbox Oil Change Interval:
Every 10,000-15,000 km (6,000-10,000 miles) or annually
Final Drive Oil Change Interval:
Every 10,000-15,000 km (6,000-10,000 miles) or annually
Brake Fluid:
DOT 4 (or DOT 3 if specified by older manuals, but DOT 4 is generally preferred)
Common Wear Items:
Clutch wear, output shaft seal leaks, front fork seal leaks, steering head bearing play, aging electrical connectors, exhaust header pipe corrosion
Engine Specific Notes:
Potential for pushrod tube seal leaks, oil consumption at higher mileage, carbon buildup on valves
Manufacturer:
Bayerische Motoren Werke AG (BMW)
Motorcycle Division Legacy:
Long history of producing robust, technically advanced motorcycles, particularly known for their boxer engines and shaft drive.
Airhead Era:
The 'Airhead' boxer series was developed over decades, evolving from earlier models into the R80, R90, and R100 series. The 1995 models represent a refined stage of this design.
Key Variants In Period:
R100GS (dual-sport), R100R (roadster), R100RS (sport-touring), R100RT (touring). R80 models were typically lower displacement variants.
Production Period:
The 'Airhead' series, including R80, R90, and R100 variants, was produced from the early 1970s through the mid-1990s. 1995 models were among the last of this lineage before the introduction of the 'Oilhead' boxers.
General Reputation:
Highly regarded for reliability, touring comfort, and build quality. Considered modern classics.
Owner Satisfaction:
Generally high, particularly among owners who appreciate the mechanical simplicity and character of the boxer engine.
Manual Certification:
Official BMW Factory Manual
