Historical Context:
BMW's R series motorcycles, particularly the 800cc and 1000cc variants, were iconic touring and everyday machines known for their durability and air-cooled boxer engine character.
Target Audience:
Owners, enthusiasts, and independent mechanics seeking to maintain, repair, or restore these classic BMW motorcycles.
Competitors Era:
Competed with other large-displacement European and Japanese motorcycles of the era, offering a distinct blend of build quality, shaft drive, and character.
Bmw Strengths:
Shaft drive, robust engineering, comfortable touring ergonomics, distinctive boxer engine sound and feel.
Manual Value:
Provides essential information for DIY maintenance and repairs, potentially saving significant costs and ensuring proper upkeep of a classic vehicle.
Models Covered:
BMW R80, R90, R100
Regions Covered:
Global (primarily European specifications)
Estimated Pages:
300-400 (estimated based on typical service manual scope for this era)
Type:
Service and Repair Manual
Scope:
Comprehensive maintenance, troubleshooting, and repair procedures
Format:
Downloadable Digital Format (likely PDF)
Engine:
Air-cooled boxer twin engine servicing, top-end overhauls, component replacement, timing, valve adjustment
Fuel System:
Carburetor tuning, cleaning, rebuilding (e.g., Bing carburetors), fuel pump, fuel lines
Ignition System:
Ignition timing, points and condenser (if applicable), coil testing, spark plug specifications
Transmission:
Gearbox maintenance, clutch service, driveshaft and final drive lubrication and inspection
Chassis Suspension:
Fork service, shock absorber inspection and replacement, wheel bearing service, steering head bearing adjustment
Brakes:
Brake system maintenance, fluid replacement, pad/shoe inspection and replacement, caliper/drum servicing
Electrical System:
Wiring diagrams, starter motor, alternator, battery maintenance, lighting, instrument cluster troubleshooting
Bodywork Fittings:
Fairing (if equipped), seat, tank, fender removal and installation, general body component care
Routine Maintenance:
Oil changes, filter replacements, lubrication points, brake checks, tire pressure checks, valve clearance adjustments
Troubleshooting:
Step-by-step diagnostics for common running issues, starting problems, electrical faults
Component Overhaul:
Detailed procedures for rebuilding carburetors, brake calipers, gearbox components, and engine top-ends
Adjustments:
Carburetor synchronization, idle speed adjustment, clutch cable adjustment, steering head bearing adjustment
Disassembly Reassembly:
Guidance on safely disassembling and reassembling major vehicle components
Depth:
In-depth technical repair and maintenance, suitable for home mechanics and professional technicians
Diagnostics:
Covers troubleshooting charts and common fault diagnosis
Specifications:
Includes critical torque values, clearances, and measurement data
Format:
PDF (Portable Document Format)
Searchability:
Likely text-searchable, allowing for quick information retrieval
Printability:
Designed for printing key sections or the entire manual for workshop use
Image Clarity:
High-resolution scans ensuring clarity of diagrams and illustrations
Digital Binding:
N/A (digital format, no physical binding)
Digital Paper Simulation:
N/A (digital format, no physical paper)
Engine Type:
Air-cooled, four-stroke, horizontally opposed twin-cylinder (Boxer)
Displacement R80:
797.5 cc
Displacement R90:
897.7 cc
Displacement R100:
979.2 cc (R100/7), 980.7 cc (R100CS, R100RS, R100RT)
Horsepower R80:
Approx. 50 HP @ 6,500 RPM
Horsepower R100:
Approx. 65 HP @ 7,000 RPM (varies by model)
Torque R100:
Approx. 75 Nm (55 lb-ft) @ 5,500 RPM (varies by model)
Carburetion:
Twin Bing carburetors (e.g., 32mm or 40mm depending on model)
Fuel Type:
Unleaded gasoline (premium recommended)
Oil Change:
Typically every 3,000-5,000 miles (5,000-8,000 km) or annually.
Valve Adjustment:
Every 6,000-10,000 miles (10,000-16,000 km).
Gearbox Oil Change:
Every 6,000-10,000 miles (10,000-16,000 km).
Engine Oil Capacity Approx:
2.5 - 3.0 liters (4-stroke motorcycle oil, e.g., SAE 20W-50 or 10W-40 depending on climate)
Gearbox Oil Capacity:
Approx. 0.75 - 1.0 liter (GL-5 80W-90 gear oil)
Brake Fluid:
DOT 3 or DOT 4 brake fluid (check specific model)
Common Wear Items:
Clutch wear, aging electrical components (e.g., CDI unit, voltage regulator), fork seal leaks, output shaft seal leaks.
Carburetor Issues:
Bing carburetors can require periodic cleaning and adjustment due to fuel deposits and wear.
Engine Sealing:
Older boxer engines may develop minor oil leaks from base gaskets or O-rings.
Bmw Motorcycles:
BMW has a long history of building motorcycles, with the boxer engine and shaft drive becoming hallmarks of their design philosophy.
R Series Legacy:
The R80, R90, and R100 series represent the evolution of BMW's airhead boxer motorcycles, building on earlier models and refining the design for performance and touring capabilities.
Production Period:
Models within this range were produced from the early 1970s through the early 1990s, with the 1985 models being part of a mature product cycle.
Model Reputation:
Renowned for reliability, touring comfort, and engineering quality, earning a strong following among motorcycle enthusiasts.
Consumer Ratings:
Consistently high ratings in vintage motorcycle reviews for durability and rider satisfaction.
Emission Standards:
Meets emission standards applicable to the mid-1980s.
