🏷️ Basic Information

Make:

BMW

Model:

K1100LT / K1100RS

Generation Designation:

Second Generation K-Series (Four-Valve)

Engine Code:

K1100

👋 Introduction

Market Position:

The K1100LT and K1100RS were positioned as premium sport-touring and touring motorcycles in the early to mid-1990s, known for their smooth inline-four engines, shaft drive, and advanced (for the time) technology.

Competitive Analysis:

Competed with other high-performance touring bikes from manufacturers like Honda (ST1100), Kawasaki (GTR1000), and Yamaha (FJ1200).

Key Features Vehicle:

Four-valve inline-four engine, fuel injection, shaft drive, ABS (optional on RS, standard on later LT), comfortable ergonomics (especially LT), robust build quality.

Key Features Manual:

Comprehensive diagnostic and repair data, detailed illustrations and diagrams, specific torque values, maintenance schedules, and troubleshooting flowcharts. Essential for DIY owners and independent workshops.

📋 Manual Details

Coverage Areas:

Full service and repair for BMW K1100LT and K1100RS models

Page Count:

Detailed page count not specified in provided information. Assumed to be comprehensive for a service manual.

Manual Type:

Service/Repair Manual

Language:

English (Assumed based on product description and typical manual availability)

Format:

Digital (Likely PDF, given common availability for older models and the seller's description).

📖 Manual Coverage

Engine System:

Engine mechanical, fuel injection, ignition, cooling, exhaust, lubrication systems

Transmission System:

Clutch, gearbox, final drive (shaft drive), troubleshooting and repair

Electrical System:

Wiring diagrams, lighting, charging system (alternator, regulator), starting system, ECU, ABS, instrument cluster, sensors

Chassis System:

Frame, suspension (front forks, rear monoshock), steering, wheels, brakes (disc brakes, ABS components)

Bodywork And Fairings:

Body panel removal and installation, fairing components, luggage systems (LT specific)

Maintenance Procedures:

Scheduled maintenance, oil changes, filter replacements, valve clearance checks, coolant flushes, brake fluid changes, spark plug replacement

Diagnostic Procedures:

Troubleshooting guides for common issues, fault code diagnosis (if applicable via diagnostics), electrical testing

Repair Procedures:

Step-by-step instructions for component removal, overhaul, and installation (e.g., engine rebuild, transmission overhaul, suspension repair)

Special Tools:

Identification and usage of BMW special tools required for specific repairs and adjustments

Technical Depth:

Comprehensive from basic maintenance to in-depth engine and component overhaul, including electrical system diagnostics and ABS functionality.

📊 Manual Specifications

File Format:

PDF (Portable Document Format) - common for digital service manuals.

Print Quality:

High-resolution images and clear text for easy readability and printing.

Binding Type:

N/A for digital format. If printed, would typically be spiral-bound or professionally bound for workshop use.

Paper Type:

N/A for digital format. If printed, would typically be durable, possibly glossy or coated paper to withstand workshop conditions.

⚙️ Engine Specifications

Engine Type:

Liquid-cooled, four-stroke, inline four-cylinder

Displacement:

1093 cc (1.1 Liters)

Bore X Stroke:

76.5 mm x 60 mm

Compression Ratio:

10.2:1

Valve Train:

DOHC, 4 valves per cylinder

Horsepower:

Approx. 100 hp (74 kW) at 8000 rpm (varies slightly by year/spec)

Torque:

Approx. 101 Nm (74 lb-ft) at 6000 rpm (varies slightly by year/spec)

Fuel Delivery:

Bosch Motronic Electronic Fuel Injection (EFI) with central throttle body

Fuel Type:

Unleaded premium gasoline (95-98 RON)

Fuel Tank Capacity:

21 Liters (5.5 US gallons)

Cooling Method:

Liquid-cooled

Oil Type:

API SG or higher, SAE 20W-40 or 10W-40 motorcycle specific oil

Oil Capacity With Filter:

Approx. 4.5 Liters (4.8 US quarts)

Engine Mounting:

Transverse, 360-degree crank

🔧 Transmission

Transmission Type:

5-speed manual gearbox

Optional Transmission:

N/A (Manual transmission only)

Clutch Type:

Hydraulically operated, dry single-plate clutch

Final Drive:

Shaft drive with universal joint

Transmission Oil Type:

Hypoid gear oil, SAE 90 (API GL-5)

Final Drive Oil Capacity:

Approx. 200 ml (0.21 US quarts)

📐 Dimensions

Length:

K1100LT: Approx. 2300 mm (90.5 in) / K1100RS: Approx. 2230 mm (87.8 in)

Width:

K1100LT: Approx. 890 mm (35 in) / K1100RS: Approx. 850 mm (33.5 in)

Height:

K1100LT: Approx. 1450 mm (57.1 in) / K1100RS: Approx. 1240 mm (48.8 in)

Wheelbase:

Approx. 1515 mm (59.6 in)

Dry Weight:

K1100LT: Approx. 245 kg (540 lbs) / K1100RS: Approx. 225 kg (496 lbs)

Wet Weight:

K1100LT: Approx. 270 kg (595 lbs) / K1100RS: Approx. 245 kg (540 lbs)

Maximum Load:

Approx. 210 kg (463 lbs)

Front Tire:

120/70 ZR 17

Rear Tire:

170/60 ZR 17

Front Wheel Size:

3.50 x 17

Rear Wheel Size:

4.50 x 17

Bolt Pattern:

4 x 100mm

🛡️ Safety Features

Safety Ratings:

No formal crash test ratings typically available for motorcycles of this era in the same way as cars. Focus on active safety features.

ABS:

BMW Integral ABS II (optional on RS, standard on later LT models)

Braking System Front:

Dual 330 mm disc brakes, twin piston calipers

Braking System Rear:

Single 280 mm disc brake, twin piston caliper

Lighting:

Halogen headlight (dual on LT), LED taillight (on later models)

💡 Technology Features

Infotainment Features:

Limited by era. Typically featured analog gauges, basic trip computer functions. Later LT models offered integrated radio/cassette players and heated grips.

Driver Assistance Systems:

Integral ABS II (Antilock Braking System)

Connectivity Features:

N/A by modern standards. Designed for mechanical and electronic system diagnostics.

Engine Management:

Bosch Motronic M2.2 or M2.4 ECU controlling fuel injection and ignition timing.

🔧 Maintenance

Oil Change Interval:

Every 10,000 km (6,000 miles) or annually, whichever comes first.

Filter Replacement Interval:

Replace oil filter with every oil change.

Valve Clearance Check Interval:

Every 20,000 km (12,000 miles)

Brake Fluid Change Interval:

Every 2 years (regardless of mileage)

Coolant Change Interval:

Every 2-3 years or as per manual recommendation

Engine Oil Spec:

API SG/SH, JASO MA, SAE 20W-40 or 10W-40 motorcycle specific oil

Brake Fluid Spec:

DOT 4 brake fluid

Coolant Spec:

BMW approved antifreeze/coolant mixture (typically ethylene glycol based) at 50/50 ratio

Known Issues:

Potential issues include failing fuel pump relays, aging fuel lines, starter motor brushes, worn clutch slave cylinder seals, and occasional ABS sensor issues. The engine itself is robust. Electrical connectors can corrode over time.

Oil Filter Part Number Example:

Mann-Filter: MWK 10, Mahle: OC 5, BMW: 11 42 1 452 776 (Cross-reference required for exact fitment)

Air Filter Part Number Example:

Mann-Filter: C 26 105, K&N: BM-1190 (Cross-reference required for exact fitment)

📚 Vehicle History

Brand Heritage:

BMW Motorrad, founded in 1916, has a long history of engineering excellence, particularly in boxer-twin engines and later in pioneering shaft drive and electronic fuel injection in motorcycles.

Model Evolution:

The K1100 series replaced the K100 in 1990, introducing a four-valve per cylinder head for increased power and torque, and an updated braking system. The LT (Luxus Tourer) variant focused on comfort and touring, featuring a large fairing, windscreen, and luggage, while the RS (Rennsport) variant was a more sporty tourer.

Production Years:

1990-1999 (K1100RS ceased production earlier, around 1996/97, succeeded by K1200RS; K1100LT continued until 1999, succeeded by K1200LT).

Manufacturing Location:

Berlin, Germany

🏆 Awards & Recognition

Recognitions:

While specific awards are not listed, the K-series was consistently praised for its engineering, comfort, and reliability, earning a strong reputation in the sport-touring segment. The LT model was particularly lauded for its touring capabilities.