Segment:
Sport-touring / Naked motorcycle (R1100R) and Sportbike (R1100S).
Competition:
Competed with Japanese inline-four sportbikes and other European naked/sport-touring models of its era. Known for its unique Boxer engine character, shaft drive, and build quality.
Engine Layout:
Air/oil-cooled, horizontally opposed two-cylinder (Boxer) engine, a hallmark of BMW Motorrad.
Drive System:
Shaft drive, eliminating the need for chain maintenance.
Frame:
Typically a steel trellis or beam frame, offering rigidity and character.
Handling:
R1100S known for its sportier handling and leaning capabilities, R1100R for more relaxed ergonomics and versatility.
Coverage Scope:
Comprehensive service and repair instructions for mechanics and experienced DIY enthusiasts.
Estimated Pages:
Varies significantly by specific publication, but typical comprehensive manuals of this era for BMW motorcycles can range from 500 to 1000+ pages.
Language:
English (typical for global distribution, confirm with seller if critical)
Format:
Likely PDF or printed book. Original BMW documentation was printed; digital versions are common reproductions.
Engine:
Detailed breakdown of the Boxer engine, including cylinder head assembly, valve train, piston and connecting rod installation, crankshaft and main bearings, oil pump, timing chain, and lubrication system.
Fuel System:
Fuel injection system (Bosch Motronic), fuel pump, fuel injectors, throttle body, fuel tank, and fuel lines.
Ignition System:
Ignition coils, spark plugs, electronic ignition control unit (Motronic).
Transmission:
Gearbox overhaul, clutch replacement, shifting mechanism, drive shaft and final drive assembly, universal joint maintenance.
Brakes:
ABS II (if equipped), brake fluid replacement, caliper overhaul, master cylinder servicing, brake disc inspection and replacement, hydraulic lines.
Suspension:
Front fork (telescopic, possibly with adjustable damping) servicing, fork seal replacement, rear shock absorber (Monolever or Paralever) adjustment and replacement, swingarm maintenance.
Electrical System:
Wiring diagrams, battery maintenance, alternator, starter motor, lighting system (headlight, taillight, turn signals), instrumentation, fuses, relays, ECU diagnostics.
Chassis And Bodywork:
Frame inspection, fairing removal and installation, seat, fuel tank, body panels, footpegs, handlebars, and controls.
Maintenance:
Regular service intervals, oil changes, filter replacements, lubrication points, brake bleeding, tire pressure checks, valve clearance adjustment.
Troubleshooting:
Diagnostic charts and procedures for common problems, fault code interpretation (if applicable).
Repair:
Step-by-step instructions for disassembly, assembly, and repair of all major vehicle components.
Specifications:
Torque specifications for critical fasteners, fluid capacities, electrical specifications, critical dimensions.
Depth:
Comprehensive, covering from basic maintenance to complex engine and gearbox rebuilds. Designed for professional mechanics.
Digital Format:
Typically PDF with searchable text and high-resolution images. Print quality is dependent on the source of the reproduction.
Print Quality:
Original BMW manuals are professionally printed. Digital reproductions aim to replicate this detail, including clear diagrams and text.
Binding:
Originals are typically bound books. Digital versions are files.
Paper Type:
Originals use durable, often glossy paper to withstand workshop conditions. Digital versions do not apply.
Engine Type:
Four-stroke, air/oil-cooled, horizontally opposed twin-cylinder Boxer engine.
Displacement:
1085 cc (for R1100 models in this era).
Bore X Stroke:
99 mm x 70.5 mm (typical for R1100 Boxer).
Compression Ratio:
10.3:1 (typical).
Horsepower:
R1100R: Approx. 90 hp @ 7250 rpm; R1100S: Approx. 98 hp @ 7500 rpm.
Torque:
R1100R: Approx. 97 Nm @ 5250 rpm; R1100S: Approx. 100 Nm @ 6000 rpm.
Fuel Delivery:
Bosch Motronic Electronic Fuel Injection (EFI).
Fuel Type:
Unleaded gasoline, minimum 95 octane (RON).
Oil Type:
SAE 20W-50 or 15W-50 motorcycle-specific engine oil meeting API SG or higher specifications. Refer to manual for exact BMW approval codes (e.g., BMW Special Plus).
Type:
5-speed constant mesh gearbox.
Drive:
Shaft drive to rear wheel.
Clutch:
Single dry plate clutch (R1100R), possibly wet multi-plate (R1100S, though typically dry for this generation).
Final Drive Oil:
Hypoid gear oil, SAE 90 or SAE 80W-90, GL-5 specification.
Length:
Varies by model, R1100R typically around 2220 mm, R1100S around 2100 mm.
Width:
Varies by model, typically around 800-900 mm including handlebars.
Height:
Varies by model, R1100R around 1250 mm, R1100S around 1180 mm (seat height).
Dry Weight:
R1100R: Approx. 220 kg; R1100S: Approx. 227 kg.
Fuel Capacity:
25 liters (including approx. 4 liters reserve).
ABS:
Optional BMW ABS II system available on many models, offering advanced braking control for its time.
Brakes Front:
Dual disc brakes with four-piston calipers.
Brakes Rear:
Single disc brake with two-piston caliper.
Lighting:
Halogen headlight, LED taillight (typical for era), integrated turn signals.
Instrumentation:
Analog tachometer and speedometer, digital odometer, trip meter, clock, and warning lights. Some models might have basic fuel level indicators.
ABS:
BMW ABS II (optional feature), providing anti-lock braking capability.
Diagnostics:
On-board diagnostics via the Motronic unit, accessible with specialized BMW diagnostic tools. Manual will detail troubleshooting steps.
Oil Change:
Every 10,000 km or annually, whichever comes first. Refer to manual for precise intervals.
Valve Clearance:
Every 20,000 km. Requires shim adjustment.
Spark Plugs:
Replace every 20,000 km. Use recommended NGK or equivalent (e.g., CR9EK or equivalent).
Brake Fluid:
Replace every 2 years. Use DOT 4 brake fluid.
Engine Oil Capacity:
Approx. 4.0 liters (with filter change). Manual specifies exact amount.
Transmission Oil Capacity:
Approx. 1.0 liter (gearbox). Manual specifies exact amount.
Final Drive Oil Capacity:
Approx. 0.25 liters. Manual specifies exact amount.
Hall Sender Unit:
Can fail intermittently, leading to starting problems or stalling. Located near the flywheel.
Fuel Pump Relay:
Early models could suffer from relay failures, preventing fuel delivery.
Transmission Input Shaft Spline:
Can wear over time, leading to clunking or difficult shifting. Requires periodic greasing.
Oil Cooler Hoses:
Can degrade and leak over time, especially the oil lines to the engine.
ABS Sensor Failure:
ABS sensors can accumulate dirt or fail, leading to ABS warning lights and system deactivation.
Brand:
BMW Motorrad, with a long history of producing boxer-engined motorcycles known for durability, engineering, and touring capabilities.
Development:
The R1100 series, including the R1100R and R1100S, represented a significant modernization for BMW's air-cooled boxer line, introducing fuel injection, four-valve cylinder heads, and updated chassis designs. The R1100S was specifically designed as BMW's sportbike offering.
Production Years:
R1100R produced from 1994-2001; R1100S produced from 1998-2005.
Manufacturing Location:
Berlin, Germany.
