Segment:
Classic European Motorcycles
Target Audience:
BMW R-Series motorcycle owners, mechanics, restorers, hobbyists
Value Proposition:
Provides essential technical data for maintaining and repairing a highly regarded range of BMW motorcycles, often unavailable through other means.
Diagnostic Tools:
Includes troubleshooting guides and potential fault diagnosis based on symptoms.
Technical Illustrations:
Likely contains diagrams and illustrations crucial for understanding complex assemblies.
Original Documentation:
Represents factory-level technical information directly applicable to the 1982 models.
Models Covered:
R80/7, R80G/S, R80RT, R80ST, R90/6, R90S, R100/7, R100S, R100CS, R100RS, R100RT, R100GS (early models)
Engines Covered:
797cc, 897cc, 979cc, 980cc Boxer Twin
Transmissions Covered:
4-speed and 5-speed manual transmissions
Estimated Page Count:
Approx. 300-400 pages (typical for a comprehensive workshop manual of this era)
Type:
Workshop Repair Service Manual
Engine:
Complete overhaul, top-end (cylinder head, valve train), bottom-end (crankshaft, connecting rods, pistons), timing, lubrication system, fuel delivery (carburetors/injection), ignition system
Transmission:
Gearbox disassembly and assembly, clutch service, shift mechanism, final drive unit
Chassis:
Frame, swingarm, driveshaft, suspension (forks, shock absorbers), steering head bearings
Brakes:
Front and rear brake systems (drum and disc variations), master cylinders, calipers, brake lines
Electrical:
Wiring diagrams, charging system (alternator, regulator), starting system (starter motor, battery), lighting, ignition, instrumentation
Fuel System:
Fuel tank, fuel lines, petcock, carburetor overhaul (Bing 32/40/42), fuel injection (K-Jetronic for some R100 models)
Bodywork:
Body panels, fenders, seat, tank, fairings (if equipped), controls
Maintenance:
Scheduled maintenance, oil changes, filter replacements, lubrication, valve clearance adjustment, carburetor synchronization, brake bleeding
Troubleshooting:
Diagnostic procedures for common problems, symptom-based troubleshooting guides
Repair:
Step-by-step instructions for component removal, repair, and reinstallation
Rebuilds:
Detailed instructions for engine and gearbox rebuilds
Specifications:
Torque specifications, clearances, fluid capacities, electrical resistance values
Depth:
Comprehensive: Covers routine maintenance, advanced diagnostics, and complete mechanical and electrical overhauls.
Type:
Air-cooled, four-stroke Boxer Twin
Configuration:
Horizontally opposed cylinders
Displacement R80:
797.1 cc (48.64 cu in)
Displacement R90:
897.1 cc (54.75 cu in)
Displacement R100:
979.1 cc (59.74 cu in) and 980 cc (59.8 cu in) depending on specific R100 variant
Bore Stroke R80:
82 mm x 75.6 mm (3.23 in x 2.98 in)
Bore Stroke R90:
90 mm x 70.6 mm (3.54 in x 2.78 in)
Bore Stroke R100:
94 mm x 70.6 mm (3.70 in x 2.78 in) or 94 mm x 72.6 mm (3.70 in x 2.86 in)
Horsepower R80:
Approx. 50 hp (37 kW) at 6500 rpm
Horsepower R90S:
Approx. 65 hp (48 kW) at 7000 rpm
Horsepower R100:
Approx. 65-70 hp (48-52 kW) at 7000 rpm (varies by model)
Torque R100:
Approx. 70-75 Nm (51-55 lb-ft) at 6000 rpm (varies by model)
Carburetors R80 R90:
Dual Bing 32mm CV carburetors (typically)
Carburetors R100:
Dual Bing 32mm or 40mm CV carburetors, or Bosch LE-Jetronic fuel injection on some models
Fuel Type:
Unleaded gasoline, 90-98 octane (RON+MON)/2 (AKI)
Fuel Capacity:
Approx. 18-23 liters (4.75-6.08 US gallons) depending on tank size and model
Type:
5-speed manual transmission (standard on most 1982 models, some earlier models had 4-speed)
Types:
4-speed manual (on some earlier R80 and R100 models, less common by 1982)
Drive Type:
Shaft drive (via driveshaft to rear wheel)
Clutch:
Single dry plate clutch, hydraulically actuated
Wheelbase:
Varies by model (approx. 1440-1500 mm / 56.7-59.1 inches)
Length:
Varies by model (approx. 2100-2200 mm / 82.7-86.6 inches)
Dry Weight:
Varies by model (approx. 190-220 kg / 419-485 lbs)
Gross Vehicle Weight Rating:
Varies by model (typically around 350-400 kg / 772-882 lbs)
Crash Test Results:
N/A (Motorcycles are not subjected to standard automotive crash testing protocols)
Braking System:
Front disc brake (single or dual, depending on model), rear drum brake (typically). Some R100 models may have dual front discs.
Suspension:
Telescopic front forks, Dual-sided swingarm with twin shock absorbers
Lighting:
Halogen headlight, taillight, brake light, turn signals
Oil Change:
Every 5,000 km (3,000 miles) or annually, whichever comes first.
Valve Adjustment:
Every 10,000 km (6,000 miles)
Carburetor Sync:
As needed, typically with valve adjustments or if symptoms arise.
Engine Oil:
SAE 20W-50 or 10W-40 motorcycle-specific oil (API SG or higher). Capacity approx. 2.5-3.0 liters.
Gearbox Oil:
SAE 80W-90 hypoid gear oil (API GL-5). Capacity approx. 0.8 liters.
Final Drive Oil:
SAE 80W-90 hypoid gear oil (API GL-5). Capacity approx. 0.25 liters.
Brake Fluid:
DOT 3 or DOT 4 brake fluid (for hydraulic clutch and disc brakes).
Common Problems:
Oil leaks (especially around cylinder base gaskets and pushrod seals), wear in the transmission input shaft splines, carburetor float issues, charging system component failures (rectifier/regulator), eventual wear in steering head bearings.
Common Problems Electrical:
Aging wiring harness insulation, headlight switch failure, diode board issues in charging system.
Common Problems Engine:
Carbon buildup in combustion chambers, timing chain tensioner wear, potential for cam follower wear with high mileage.
Legacy:
BMW Motorrad has a long and distinguished history, particularly with its boxer-twin engine motorcycles known for reliability, durability, and touring capability.
Airhead Era:
The R80, R90, and R100 series are part of the 'Airhead' family, characterized by their air-cooled boxer engines, shaft drive, and robust construction. These models evolved from earlier 750cc and 1000cc BMWs, with continuous improvements in performance, handling, and features throughout the 1970s and 1980s.
1982 Updates:
The 1982 model year saw continued refinement, with the R80G/S gaining popularity as an early 'adventure bike,' the R100RS offering aerodynamic touring, and the R90S representing the sportiest variant.
Manufacturing Location:
Berlin, Germany (Spandau factory)
Market Reputation:
Highly regarded for build quality, reliability, and longevity. Often considered a 'modern classic' with strong owner loyalty.
Durability:
Excellent. Engines are known to last hundreds of thousands of kilometers with proper maintenance.
Manual Accuracy:
High (as it's a reproduction of factory documentation).
