Target Audience:
BMW R100 owners, mechanics, and restorers seeking in-depth repair and maintenance information.
Manual Advantage:
Comprehensive coverage that goes beyond basic maintenance, addressing full rebuilds and restoration.
Diagnostic Focus:
Emphasis on diagnostic procedures to identify and resolve issues efficiently.
Restoration Support:
Provides the necessary detail for enthusiasts undertaking full restoration projects.
Manual Coverage Scope:
Comprehensive repair, maintenance, rebuilding, refurbishing, and restoration
Estimated Page Count:
Detailed (exact count not provided, but described as 'very detailed')
Manual Type:
Service and Repair Manual
Language:
English (presumed based on product name and description)
Format:
Digital (PDF inferred from typical online sales of such manuals, not explicitly stated)
Engine Repair:
Complete overhaul procedures, piston/ring replacement, cylinder head work, valve adjustments, timing chain, oil pump, lubrication system.
Fuel System:
Carburetor tuning and rebuilding (e.g., Bing carburetors), fuel tank maintenance, fuel lines, fuel pump operation.
Ignition System:
Spark plug diagnosis and replacement, ignition coil testing, distributor maintenance, electronic ignition components.
Transmission And Drivetrain:
Gearbox maintenance, clutch adjustment and replacement, final drive inspection, driveshaft lubrication.
Brakes:
Brake system overhaul, caliper servicing, master cylinder replacement, brake fluid bleeding, pad and disc inspection.
Suspension:
Fork seal replacement, rear shock absorber servicing, swingarm maintenance, wheel bearing checks.
Electrical System:
Wiring diagrams, battery maintenance, charging system (alternator/generator), starter motor, lighting circuits, instrument panel functions.
Chassis And Body:
Frame inspection, body panel repair and alignment, seat mounting, fuel tank mounting, fender maintenance.
Routine Maintenance:
Oil changes, filter replacements, chain lubrication, tire pressure checks, spark plug gap adjustment.
Troubleshooting:
Diagnostic charts and common problem identification for engine, electrical, and mechanical systems.
Major Repairs:
Engine rebuilds, transmission overhauls, electrical system diagnostics and repair, suspension component replacement.
Restoration Guidance:
Detailed instructions for component refurbishment, refinishing, and reassembly for vintage appeal.
Diagnostic Capabilities:
Includes detailed diagnostic procedures and specifications for identifying and resolving malfunctions.
Rebuild Instructions:
Provides step-by-step instructions for complete disassembly, inspection, repair, and reassembly of major components.
Specification Data:
Includes torque values, clearances, fluid capacities, electrical resistance values, and other critical specifications.
Engine Type:
Air-cooled, four-stroke, boxer-twin cylinder
Engine Displacement:
980 cc (approx. 971cc for some variants like R100RS/RT)
Bore X Stroke:
94 mm x 70.7 mm
Compression Ratio:
Typically 8.5:1 or 9.5:1 depending on model variant (e.g., R100S, R100CS)
Horsepower:
Approximately 60-70 hp (depending on model variant and tuning)
Torque:
Approximately 70-75 Nm (49-54 lb-ft) at around 3000-4000 rpm
Carburetor Type:
Dual Bing carburetors (e.g., 32mm or 40mm depending on model)
Fuel Type:
Unleaded gasoline, minimum octane rating 91 (RON+MON)/2 (AKI)
Valve Actuation:
Overhead valves, pushrod actuated
Cooling System:
Air-cooled
Oil Type:
SAE 20W-50 or 10W-40 motorcycle-specific engine oil
Oil Capacity:
Approximately 2.5 - 3.0 liters (including oil filter)
Transmission Type:
5-speed, constant mesh manual gearbox
Optional Gearbox:
N/A (standard for R100 models)
Clutch Type:
Single dry plate, diaphragm spring
Gearbox Oil Type:
API GL-5, SAE 75W-90 or 80W-90 gear oil
Final Drive Oil Type:
API GL-5, SAE 75W-90 or 80W-90 gear oil
Length:
Varies by model (e.g., R100RS, R100RT, R100GS)
Dry Weight:
Approximately 190-220 kg (419-485 lbs) depending on model
Gross Vehicle Weight Rating:
Typically around 380-400 kg (838-882 lbs)
Front Tire Size:
Commonly 3.50-18 or 100/90-18
Rear Tire Size:
Commonly 4.00-18 or 120/90-18
Wheel Type:
Spoked or cast alloy wheels
Wheel Bolt Pattern:
N/A (Hub-mounted) or standard BMW spoke pattern
Safety Ratings:
N/A (Motorcycle, not subject to automotive crash test ratings)
Braking System:
Dual disc front brakes (often Brembo), single disc rear brake (on most models). Later models may feature ABS as an option.
Lighting:
Halogen headlamp, taillight, brake light, turn signals.
Instrumentation:
Analog speedometer, tachometer, odometer, trip meter, oil pressure light, neutral indicator, turn signal indicators, high beam indicator.
ABS:
Anti-lock Braking System (ABS) was an optional feature on some later R100 models, but typically not standard on the 1985 model year unless specified for particular variants.
Connectivity Features:
N/A (Basic motorcycle of the era)
Engine Oil Change Interval:
Every 5,000 km or 6 months, whichever comes first.
Valve Adjustment Interval:
Every 10,000 km or annually.
Spark Plug Replacement Interval:
Every 10,000 km.
Gearbox Oil Change Interval:
Every 20,000 km or annually.
Brake Fluid Type:
DOT 4, glycol-based brake fluid.
Fork Oil Type:
SAE 15W or 20W suspension fluid (specific grade depends on desired damping characteristics).
Common Wear Items:
Clutch wear, swingarm pivot bearings, fork seals, valve seat wear, alternator brushes.
Electrical Gremlins:
Corrosion on connectors, aging wiring insulation, and occasional regulator/rectifier issues are not uncommon.
Carburetor Synchronization:
Regular synchronization of Bing carburetors is crucial for smooth running and optimal performance.
Bmw Motorcycle Legacy:
BMW has a long and distinguished history in motorcycle manufacturing, known for engineering excellence and durability.
R Series Development:
The R100 is part of BMW's iconic 'R' series of boxer-twin motorcycles, evolving from earlier models like the R75 and R90. It represented a refinement and increase in displacement for the touring and sport-touring segments.
Production Years R100:
Produced from the late 1970s through the early 1990s, with the 1985 model being a significant iteration.
Manufacturing Location:
Berlin, Germany (BMW Motorrad plant)
R100 Variants 1985:
Includes models such as R100RT (Touring), R100RS (Sport), R100CS (Classic Sport), and R100T (basic touring). Specific configurations might vary by market.
