Positioning:
The BMW R100PD was a specialized variant of the R100 series, often utilized by police forces and for touring, known for its robustness and long-distance capability. This manual targets owners and mechanics who need to maintain and repair these capable machines.
Competitors:
Competed with other large displacement touring motorcycles of its era, such as certain Moto Guzzi models, large displacement Japanese bikes (e.g., Honda Gold Wing variants, Yamaha XS Eleven), and other BMW boxers.
Features:
Iconic BMW air-cooled boxer twin engine, shaft drive, robust chassis, and a reputation for reliability and comfortable touring, especially in the PD (Police) variant which often featured enhanced suspension and equipment.
Model Years Covered:
1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
Geographic Coverage:
Global (as applicable to the R100PD model)
Type:
Workshop Service Manual / Repair Manual
Delivery Method:
Instant Download
Engine:
Detailed information on the R100PD's air-cooled flat-twin boxer engine, including disassembly, assembly, inspection, and troubleshooting of components such as cylinders, pistons, crankshaft, camshaft, valves, and timing.
Fuel System:
Comprehensive coverage of the fuel delivery system, including carburetors (likely Bing), fuel lines, fuel pump (if applicable), and fuel tank maintenance and adjustment.
Ignition System:
Information on the ignition system, including spark plugs, ignition coils, points (if applicable), condensers, and timing adjustments.
Transmission:
Detailed procedures for the gearbox, clutch, and final drive, including maintenance, repair, and adjustment of these components.
Brakes:
Brake system servicing, including hydraulic systems, brake lines, master cylinders, calipers, and brake pads/shoes for both front and rear brakes. Specifics on BMW's early disc brake systems.
Suspension:
Front fork (telescopic) and rear shock absorber (swingarm) maintenance, repair, and adjustment, including fluid changes and seal replacements.
Electrical System:
Wiring diagrams, troubleshooting for lighting, charging system (alternator/generator), battery, starter motor, and instrument panel.
Frame And Bodywork:
Procedures for frame inspection, body panel removal and installation, seat, handlebars, and general chassis maintenance.
Wheels And Tires:
Information on wheel bearing maintenance, tire inspection, and replacement recommendations.
Maintenance:
Routine maintenance tasks such as oil changes, filter replacements, spark plug checks, air filter cleaning/replacement, and lubrication schedules.
Troubleshooting:
Systematic diagnostic procedures for identifying and resolving common problems across all major vehicle systems.
Repair:
Detailed step-by-step instructions for component repair, including disassembly, cleaning, inspection, part replacement, and reassembly.
Adjustment:
Specific guidance on adjustments for engine timing, carburetor synchronization, valve clearances, clutch, and brakes.
Installation:
Procedures for installing new or replacement parts and components.
Disassembly:
Comprehensive instructions for taking apart various vehicle systems and components.
Assembly:
Detailed guidance on reassembling disassembled components and systems.
Depth:
Comprehensive, covering everything from basic maintenance to advanced engine rebuilds and electrical system diagnostics. Includes special tool recommendations and torque specifications.
Illustrations:
Includes pictorial diagrams, exploded diagrams, drawings, and photos to guide through service and repair procedures.
Special Tools:
References specific special service tools required for various operations, often with illustrations of their usage.
Service Data:
Provides essential service data, including specifications, allowable limits, and tightening torques.
Engine Type:
Air-cooled, four-stroke, flat-twin (boxer) engine
Displacement:
979 cc (approx.)
Bore X Stroke:
94 mm x 70.7 mm (typical for R100)
Compression Ratio:
Typically around 8.2:1 to 9.5:1, depending on specific sub-model and tuning.
Valve Actuation:
Overhead camshaft (driven by pushrods and rocker arms)
Horsepower Output:
Approximately 65-70 HP at 7000-7500 RPM (varies slightly by model year and specific tuning)
Torque Output:
Approximately 70-75 Nm (51-55 lb-ft) at 5500-6000 RPM
Carburetors:
Twin 32mm or 36mm Bing constant-velocity carburetors (common for R100 series)
Fuel Type:
Unleaded gasoline (recommendation based on era and compression ratio, typically 91-95 RON/87-91 AKI)
Oil Capacity:
Approximately 2.5 - 3.0 liters (check manual for exact spec)
Oil Type:
SAE 20W-50 or 10W-40 motorcycle-specific oil (check manual for exact specification)
Oil Change:
Typically every 5,000-10,000 km (3,000-6,000 miles) or annually, whichever comes first.
Valve Adjustment:
Recommended every 10,000-20,000 km (6,000-12,000 miles).
Spark Plug Replacement:
Typically every 10,000-20,000 km (6,000-12,000 miles).
Engine Oil:
SAE 20W-50 motorcycle oil recommended by BMW for this era (refer to manual for exact grade).
Transmission Oil:
Hypoid gear oil, e.g., SAE 80W/90 (check manual for exact specification).
Brake Fluid:
DOT 3 or DOT 4 brake fluid (ensure it's fresh and compatible).
Fork Oil:
Specific weight fork oil, typically around SAE 15W (check manual for exact specification and capacity).
Common Problems:
Potential issues include wear on pushrod seals, aging electrical components, carburetor synchronization issues, and wear in the transmission or final drive over many miles.
Preventative Maintenance:
Regularly checking and replacing wear items, ensuring proper lubrication, and adhering to the service schedule outlined in the manual are crucial for longevity.
Heritage:
BMW Motorrad has a long history of producing robust, reliable motorcycles, particularly renowned for their boxer engines and shaft drive systems, dating back to the early 20th century.
Evolution:
The R100PD is part of the long lineage of BMW air-cooled boxer twins that evolved from the R50/5 and R75/5 models, with continuous improvements in engine size, power, and chassis technology leading up to the R100 generation.
Production Period:
The R100 series, including the R100PD variant, was produced from the late 1970s through the mid-1990s, with the PD models being a specialized police and touring variant.
Manufacturing Location:
Berlin, Germany
