🏷️ Basic Information

Make:

BMW

Model:

K1100RS

Model Generation Designation:

K1100 Series (often referred to as K100 Generation 2)

Model Years Covered:

Primarily covers models produced around the manual's publication date of May 1999, likely encompassing 1991-1999 model years for K1100LT and K1100RS.

Chassis Code:

K1100LT: (Specific designation might be part of larger chassis codes, often incorporating engine codes), K1100RS: (Specific designation might be part of larger chassis codes, often incorporating engine codes)

Engine Code:

K1100 Series (specific codes may vary but related to the 1047cc inline-four)

👋 Introduction

Market Position:

The K1100LT and K1100RS represented BMW's premium touring and sport-touring offerings in the early to mid-1990s, competing with other high-displacement European and Japanese motorcycles known for their comfort, performance, and engineering. The LT model focused on long-distance touring with extensive fairing and luggage, while the RS offered a more sporting, yet still comfortable, riding experience.

Competitive Analysis:

Competitors at the time included models from Honda (e.g., ST1100 Pan European), Yamaha (e.g., FJ1200), Kawasaki (e.g., GTR1000), and European manufacturers like Ducati and Moto Guzzi in their respective touring segments. The K1100 series stood out for its distinctive boxer-like inline-four engine (transverse mounting but with cylinders oriented in a nearly horizontal plane), shaft drive, and typically robust build quality.

Key Features:

Iconic BMW inline-four engine, shaft drive, sophisticated ABS II braking system, comfortable ergonomics (especially LT), capable handling, and durable construction. The LT model was particularly well-equipped for touring with integrated luggage and wind protection.

📋 Manual Details

Vehicles Covered:

BMW K1100LT, BMW K1100RS

Page Count:

364

Manual Type:

Workshop Manual / Service Manual / Repair Manual

Language:

English (presumed, standard for OEM manuals of this era unless otherwise specified)

Format:

Digital (PDF implied by file size and typical sales of manuals)

📖 Manual Coverage

Engine:

Detailed coverage of the 1047cc inline-four cylinder engine, including assembly, disassembly, lubrication, cooling system, fuel injection (Bosch Motronic), ignition system, exhaust system, and performance tuning.

Transmission:

Coverage of the 5-speed sequential gearbox, clutch operation and adjustment, gearbox overhaul, and lubrication.

Drivetrain:

Detailed information on the shaft drive system, including universal joints, final drive unit overhaul, and lubrication specifications.

Chassis:

Comprehensive coverage of the steel frame, front suspension (BMW Duolever on some variants or conventional forks), rear suspension (Paralever swingarm), steering system, and wheel bearings.

Brakes:

In-depth coverage of the ABS II braking system, including hydraulic components, brake fluid specifications, bleeding procedures, caliper maintenance, and rotor inspection.

Electrical System:

Extensive electrical system diagrams, troubleshooting guides, starter motor, alternator, battery maintenance, lighting system, instrumentation, and wiring harness details.

Fuel System:

Detailed explanation of the Bosch Motronic fuel injection system, including fuel pump, injectors, throttle body, sensors (e.g., MAP, TPS, temperature), and emission control systems.

Bodywork:

Information pertaining to the fairings, seats, luggage systems (especially for the LT model), and associated fasteners and mounting points.

Maintenance:

Scheduled maintenance tasks, oil changes, filter replacements, spark plug checks, valve clearance adjustments, brake fluid changes, and lubrication schedules.

Troubleshooting:

Systematic diagnostic procedures for common and uncommon issues across all major vehicle systems, including fault code interpretation if applicable.

Repair:

Step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation of all major mechanical and electrical parts.

Overhaul:

Detailed procedures for complete engine rebuilds, transmission overhauls, and final drive unit rebuilding.

Adjustments:

Procedures for adjusting clutch, throttle cables, valve clearances, ignition timing (if applicable to the specific variant), and suspension settings.

Diagnostics:

Guidance on using diagnostic tools, interpreting sensor data, and diagnosing issues related to the fuel injection and ignition systems.

Technical Depth:

Comprehensive, covering basic maintenance to complete engine and transmission rebuilds. Suitable for professional mechanics and experienced DIY enthusiasts.

Diagrams And Illustrations:

Includes detailed exploded views, wiring diagrams, hydraulic schematics, and step-by-step illustration for complex procedures.

📊 Manual Specifications

File Format:

PDF

File Size:

8.6 Mbytes

Quality Grade:

1

Quality Comments:

Implies excellent digital reproduction, likely crisp text and clear images/diagrams.

Binding Type:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

Manual Completeness:

OEM (Original Equipment Manufacturer) specification, indicating a complete and authoritative source of information.

Preview Availability:

Yes (Includes contents page and samples)

⚙️ Engine Specifications

Engine Type:

Liquid-cooled, four-stroke inline four-cylinder

Displacement:

1031 cc (common variation, some sources may state 1047cc)

Bore X Stroke:

73.0 mm x 60.0 mm

Compression Ratio:

10.0:1

Horsepower Hp:

Approx. 100-101 hp at 8000 rpm (subject to specific model year and tuning)

Torque Lb-Ft:

Approx. 70-72 lb-ft at 6750 rpm (subject to specific model year and tuning)

Fuel System Type:

Bosch Motronic electronic fuel injection (EFI)

Fuel Type:

Unleaded gasoline, minimum 91 RON (Research Octane Number) or equivalent.

Oil Capacity Quarts:

Approx. 4.2 quarts (4.0 liters) with filter change.

Oil Type:

SAE 15W-50 or 20W-50 API SG or higher. (Consult manual for specific viscosity recommendations based on ambient temperature).

Cooling System Type:

Liquid-cooled

Coolant Type:

Ethylene glycol based antifreeze mixture (e.g., BMW recommended coolant or equivalent) with distilled water.

🔧 Transmission

Transmission Type:

5-speed manual sequential gearbox

Clutch Type:

Hydraulically operated, multi-plate wet clutch

Final Drive:

Shaft drive

Gearbox Oil Capacity Liters:

Approximately 1.5 liters (check manual for precise capacity).

Gearbox Oil Type:

API GL-5, SAE 75W-90 or 80W-90 gear oil.

📐 Dimensions

Length:

K1100LT: Approx. 2340 mm (92.1 in), K1100RS: Approx. 2180 mm (85.8 in)

Width:

K1100LT: Approx. 880 mm (34.6 in) (including panniers), K1100RS: Approx. 790 mm (31.1 in)

Height:

K1100LT: Approx. 1400 mm (55.1 in) (including windscreen), K1100RS: Approx. 1270 mm (50.0 in) (including windscreen)

Dry Weight Kg:

K1100LT: Approx. 260 kg (573 lbs), K1100RS: Approx. 240 kg (529 lbs)

Fuel Tank Capacity Liters:

21 liters (5.5 US gallons)

Wheelbase:

Approx. 1490 mm (58.7 in)

🛡️ Safety Features

ABS System:

BMW Motorrad ABS II (Anti-lock Braking System) standard on most models, a significant safety feature for its time.

Active Features:

Anti-lock Braking System (ABS), responsive braking components, stable chassis dynamics.

Passive Features:

Sturdy frame construction, effective fairings for rider protection from elements, integrated handguards (common feature).

💡 Technology Features

Infotainment Features:

Basic instrumentation including speedometer, tachometer, fuel gauge, temperature gauge, and warning lights. The LT model often included a sophisticated audio system and intercom provisions, though this would be considered early automotive infotainment.

Driver Assistance Features:

BMW Motorrad ABS II is the primary driver assistance technology, enhancing braking safety. Cruise control was an option on some models, particularly the LT.

Connectivity Features:

Very limited by modern standards. Primarily focused on the bike's internal systems and basic rider communication (intercom on LT). No Bluetooth or smartphone integration.

Engine Management System:

Bosch Motronic M1.2 or M2.2 (depending on exact model year and revision), a sophisticated (for its time) integrated engine control unit managing fuel injection and ignition timing.

🔧 Maintenance

Oil Change Interval:

Every 6,000 miles (10,000 km) or annually, whichever comes first. (Confirm with specific manual)

Valve Clearance Interval:

Every 12,000 miles (20,000 km) or biennially. (Shims used, requires careful measurement and adjustment)

Brake Fluid Change Interval:

Every 2 years (due to hygroscopic nature of brake fluid). ABS system requires specific bleeding procedures.

Spark Plug Replacement:

Refer to manual, typically around 12,000-24,000 miles (20,000-40,000 km), depending on plug type.

Engine Oil:

SAE 15W-50 or 20W-50 API SG or higher (as stated previously)

Brake Fluid:

DOT 4 or DOT 4 Plus (High performance synthetic) for ABS II system.

Coolant:

Ethylene glycol based coolant mixed 50/50 with distilled water.

Transmission Oil:

API GL-5, SAE 75W-90 or 80W-90 gear oil.

Final Drive Oil:

API GL-5, SAE 75W-90 or 80W-90 gear oil. (Capacity typically around 0.25 liters - consult manual).

Known Issues:

Potential for fuel pump relay failure, aging rubber components (hoses, seals), ABS modulator issues (rare but costly), starter motor solenoids can weaken, corrosion on electrical connectors. Some models may experience clutch slave cylinder leaks.

Service Tip:

Regular inspection of the wiring harness and fuel lines is recommended due to age. Use of dielectric grease on electrical connectors can prevent corrosion.

📚 Vehicle History

Brand Heritage:

BMW Motorrad has a long and storied history dating back to the early 20th century, known for its engineering prowess, durability, and focus on rider comfort and safety. The K-series, introduced in the early 1980s, marked BMW's significant move into inline-four cylinder engines, setting it apart from its traditional boxer twins.

Model Evolution:

The K1100 series evolved from the earlier K100 models, featuring an increased displacement (from 987cc to 1031cc or 1047cc), improved fuel injection, revised aerodynamics, and often the implementation of the Paralever rear suspension. The LT (Luxus Touring) variant was specifically designed for long-distance travel, offering a comprehensive touring package, while the RS (Rennsport) focused on sporty touring.

Production Period:

The K1100 series was produced from approximately 1991 to 1999, with the LT and RS variants being prominent models within this generation.

Manufacturing Location:

Berlin, Germany (Spandau plant)

🏆 Awards & Recognition

Recognitions:

While specific individual awards for the K1100LT/RS might not be widely publicized, the K-series as a whole was recognized for its innovative engineering, smooth power delivery, and touring capability, solidifying BMW's position in the premium motorcycle market.

Ratings:

Consistently rated highly by motorcycle journalists and owners for reliability, comfort on long rides, and distinctive performance characteristics.