Target Audience:
BMW R100 owners, aspiring restorers, independent workshops, and motorcycle enthusiasts seeking detailed technical information.
Value Proposition:
Provides critical, manufacturer-level data essential for maintaining the longevity and performance of the iconic BMW R100 series, saving significant costs compared to dealership servicing.
Comprehensiveness:
Covers virtually every aspect of the motorcycle, enabling users to perform tasks ranging from routine maintenance to complete engine rebuilds.
Diagrams Illustrations:
Includes detailed exploded diagrams, schematics, and step-by-step illustrations to clarify complex procedures.
Vehicle Models Covered:
BMW R100 Series (including R100/7, R100S, R100RS, R100RT, R100CS)
Engine Variants Covered:
All 980cc (1000cc class) boxer-twin engines fitted to R100 models
Estimated Page Count:
Likely over 200 pages (typical for comprehensive service manuals of this era)
Type:
Service and Repair Manual
Format:
Likely Printed or PDF
Engine:
Full overhaul, diagnosis, component replacement (pistons, rings, valves, camshaft, crankshaft, bearings)
Fuel System:
Carburetor tuning and overhaul (Dell'Orto or Bing), fuel pump, fuel lines, filters
Ignition System:
Ignition timing, coil replacement, spark plug specifications, electronic ignition systems (if applicable to specific models)
Transmission:
Gearbox disassembly and reassembly, clutch service, drive shaft maintenance, final drive overhaul
Brakes:
Hydraulic system service (master cylinder, calipers, brake lines), pad/shoe replacement, disc/drum inspection
Suspension:
Front fork service (oil changes, seal replacement), rear shock absorber maintenance, swingarm inspection
Electrical System:
Wiring diagrams, battery service, alternator/charging system, starter motor, lighting circuits, instrument cluster
Chassis And Bodywork:
Frame inspection, fairing removal/installation, seat servicing, fender maintenance
Preventative Maintenance:
Oil changes, filter replacements, lubrication points, bolt torquing specifications, valve clearance checks
Troubleshooting:
Diagnostic charts for common running issues, electrical faults, and mechanical problems
Rebuilding Procedures:
Step-by-step instructions for complete engine, gearbox, and differential rebuilds
Component Replacement:
Detailed guides for replacing individual parts and sub-assemblies
Adjustments:
Carburetor sync, idle speed, throttle cable, clutch cable, brake lever
Depth:
Comprehensive (from basic adjustments to complete engine rebuilds)
Diagnostic Capabilities:
In-depth diagnostic procedures and specifications
Digital Quality:
High-resolution scans or digital creation, ensuring clarity of text and diagrams (if PDF)
Print Standard:
Professional printing quality with clear diagrams and readable text (if printed)
Binding:
Durable binding suitable for workshop use (e.g., spiral-bound, lay-flat pages) if printed
Paper Quality:
Durable paper stock resistant to grease and workshop conditions (if printed)
Engine Type:
Air-cooled, four-stroke, horizontally opposed boxer twin
Displacement:
980 cc (97.9 cu in)
Bore X Stroke:
90.0 mm x 76.0 mm (approx.)
Compression Ratio:
8.5:1 to 9.5:1 (depending on specific R100 variant)
Valve Train:
Overhead camshaft (OHC), pushrod operated valves
Horsepower:
Approx. 65-70 hp (48-52 kW) at 7000-7250 rpm (depending on model)
Torque:
Approx. 75 Nm (55 lb-ft) at 5000-5500 rpm (depending on model)
Carburetor Type:
Dual Dell'Orto PHM 40 CS or Bing 40/42 (specific to model variant)
Fuel Grade:
Premium Unleaded Gasoline (91+ Octane)
Type:
5-speed constant mesh gearbox
Drive Type:
Shaft drive to rear wheel
Clutch:
Single dry plate, diaphragm spring operated
Gear Ratios:
Specific ratios detailed within the manual for each gear
Final Drive Ratio:
Typically 31:11 or similar, specific to model variant
Transmission Fluid:
GL-5 Hypoid gear oil, SAE 90 (e.g., Castrol SAF-XO or equivalent)
Wheelbase:
Approx. 1465 mm (57.7 inches) (variable by model)
Seat Height:
Approx. 790-820 mm (31-32 inches) (variable by model)
Dry Weight:
Approx. 215-235 kg (474-518 lbs) (depending on model and equipment)
Fuel Capacity:
24 liters (6.3 US gal) including 3-liter reserve
Crash Safety:
N/A (motorcycle, no standardized ratings like cars)
Braking System:
Dual front disc brakes, single rear disc brake (varies by model, some may have drum rear)
Frame Construction:
Steel tube duplex cradle frame
Oil Change Interval:
Every 5,000 km (3,000 miles) or annually, whichever comes first.
Valve Adjustment Interval:
Every 10,000 km (6,000 miles).
Spark Plug Replacement:
Every 10,000 km (6,000 miles) or as needed based on condition.
Engine Oil Type:
API SG or higher, SAE 20W-50 or 10W-40 (depending on climate). Capacity approx. 2.5 liters.
Brake Fluid Type:
DOT 4 (or DOT 3 if specified for earlier models, check manual for precise recommendation)
Fork Oil Type:
Automatic Transmission Fluid (ATF) or specific fork oil grades (e.g., SAE 15W). Capacity approx. 220-240 ml per fork leg.
Oil Leaks:
Common areas for minor oil seepage include cylinder base gaskets, valve covers, and output shaft seals.
Carburetor Issues:
Bing or Dell'Orto carburetors can be sensitive to dirt and require regular cleaning and synchronization.
Clutch Wear:
Diaphragm clutch springs can weaken over time, leading to clutch slip.
Electrical Gremlins:
Older wiring harnesses can degrade, leading to intermittent electrical faults.
Bmw Motorrad Legacy:
BMW Motorrad, established in 1916, known for engineering excellence, reliability, and distinctive boxer-twin engines.
R Series Development:
The R100 built upon the successful R75/5, R90/6, and R100/7 series, representing a refinement and increase in displacement for the large touring and sport-touring segment of BMW motorcycles.
R100 Variants:
Introduced in 1976 as the R100/7, it evolved into models like the R100S (Sport), R100RS (Rennsport - Racing Sport), R100RT (Reise-Tourer - Touring), and R100CS (Classic Sport).
Production Period:
The R100 series was produced from 1976 through the early 1980s, with the 1979 model being a key iteration.
