🏷️ Basic Information

Make:

BMW

Model:

K1100LT / K1100RS

Model Nickname:

K-Series Flying Brick

Product Type:

Service/Repair Manual

👋 Introduction

Target Audience:

BMW K1100LT and K1100RS owners, independent motorcycle mechanics, and enthusiasts undertaking DIY repairs

Value Proposition:

Essential tool for maintaining, troubleshooting, and repairing these iconic BMW motorcycles, saving time and money compared to dealership service

Comparison To Alternatives:

Often superior to generic online forums or basic repair guides due to its OEM-level detail and manufacturer-specific procedures

Feature 1:

Complete tear-down and rebuild instructions

Feature 2:

Detailed part diagrams for accurate component identification

Feature 3:

Inclusion of critical torque specifications

Feature 4:

Troubleshooting guides for common issues

📋 Manual Details

Primary Coverage:

BMW K1100LT and K1100RS motorcycles

Secondary Coverage:

May include common components shared with other K-series models of the era

Estimated Pages:

300-500 (typical for comprehensive service manuals)

Type:

Comprehensive Workshop/Service Manual

Language:

English (most common for international markets, but verify)

Format:

Likely Printed Book or Printable PDF

File Format:

PDF (if digital); High-quality paper (if printed)

Print Quality:

Professional printing for clarity of text and diagrams

Binding Type:

Perfect bound or spiral bound for ease of use in a workshop environment

Paper Type:

Durable, possibly glossy or semi-gloss paper to withstand workshop conditions

📖 Manual Coverage

Engine Mechanical:

Engine tear-down and rebuild, cylinder head, valve train, piston and connecting rod assembly, crankshaft, timing, oil pump, lubrication system

Fuel System:

Fuel injection system (Bosch Motronic), fuel pump, injectors, fuel lines, throttle body

Ignition System:

Ignition coils, spark plugs, ECU (Engine Control Unit) interfaces

Cooling System:

Radiator, coolant pump, fan, thermostat, hoses, fluid specifications

Exhaust System:

Exhaust headers, catalytic converter, muffler, lambda sensors (if applicable)

Transmission:

Clutch (dry single plate), gearbox (5-speed), final drive (shaft drive), gear oil specifications, rebuild procedures

Electrical System:

Wiring diagrams, battery, charging system (alternator, regulator), starter motor, lighting (headlight, taillight, signals), instrumentation, fuses, relays

Braking System:

Front and rear disc brakes, ABS (Anti-lock Braking System) if equipped, brake fluid specifications, bleed procedures, caliper and master cylinder service

Suspension:

Front forks (telescopic, potentially with adjustable damping), rear monoshock (Paralever system), fork oil specifications, seal replacement, shock absorber service

Chassis And Bodywork:

Frame, fairings (LT touring model), seat, fuel tank, body panels, fasteners, mounting hardware

Wheels And Tires:

Wheel bearing service, tire pressure recommendations, wheel specifications

Routine Maintenance:

Oil and filter changes, spark plug replacement, air filter cleaning/replacement, brake fluid flush, coolant flush, drive shaft lubrication

Troubleshooting:

Diagnostic flowcharts, common fault identification, solutions for electrical and mechanical issues

Major Repairs:

Engine overhaul, transmission rebuild, suspension component replacement, ABS system diagnostics and repair

Component Disassembly Reassembly:

Detailed step-by-step instructions for removing, inspecting, repairing, and reinstalling all major motorcycle components

Torque Specifications:

Essential torque values for all critical fasteners, ensuring correct assembly and preventing component damage

Depth Level:

Comprehensive: From basic rider maintenance to complete engine and transmission rebuilds

Diagnostic Capability:

Advanced diagnostic procedures, including troubleshooting electrical systems and fuel injection issues

Illustration Quality:

High-quality illustrations, line drawings, and detailed part diagrams to aid in understanding complex procedures

⚙️ Engine Specifications

Engine Type:

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

Displacement:

1093 cc (1.1 L)

Bore X Stroke:

72 mm x 67.5 mm

Compression Ratio:

10.0:1

Horsepower Kw:

100 hp (74 kW) at 7,500 rpm (approximate, subject to market variations)

Torque Nm:

107 Nm (79 lb-ft) at 6,000 rpm (approximate)

Fuel Delivery:

Bosch Motronic Electronic Fuel Injection (EFI) with Throttle Body Injection (TBI)

Fuel Type:

Unleaded gasoline (min. 91 RON/87 AKI)

Ignition Type:

Electronic ignition (Motronic control)

Cooling Method:

Liquid-cooled

🔧 Transmission

Transmission Type:

5-speed manual gearbox

Clutch Type:

Dry, single-plate diaphragm spring clutch

Final Drive:

Shaft drive

Gear Ratios:

Detailed ratios provided in the manual for each gear

Final Drive Ratio:

Specific ratio provided in the manual

Transmission Fluid Type:

GL-5 SAE 75W-90 hypoid gear oil recommended (specific BMW part number or equivalent in manual)

📐 Dimensions

Wheelbase:

1509 mm (59.4 in)

Length Lt:

2310 mm (90.9 in)

Length Rs:

2160 mm (85.0 in)

Dry Weight Lt:

279 kg (615 lbs)

Dry Weight Rs:

233 kg (514 lbs)

Fuel Capacity:

21 liters (5.5 US gal), including a 4-liter reserve

Seat Height Lt:

810 mm (31.9 in) (adjustable)

Seat Height Rs:

780 mm (30.7 in)

🛡️ Safety Features

ABS Availability:

Optional ABS II system available on many models

Braking System:

Dual front disc brakes, single rear disc brake; ABS II provides anti-lock functionality

Lighting:

Halogen headlight, LED taillight (LT), front and rear turn signals

Frame Construction:

Steel tubing frame for rigidity and stability

Fairing Lt:

Full fairing on LT model for wind protection and rider comfort

💡 Technology Features

Instrumentation:

Analog speedometer and tachometer, LCD display for fuel level, gear indicator (on some models), odometer, trip meter, warning lights

ABS System:

BMW ABS II system (optional on most models) for enhanced braking control

Diagnostic Port:

On-board diagnostics (OBD) capabilities via a specific BMW diagnostic connector for engine management and ABS troubleshooting

🔧 Maintenance

Oil Change Interval:

Every 5,000-10,000 km (3,000-6,000 miles) or annually, as specified in the manual

Major Service Interval:

Every 20,000-30,000 km (12,000-18,000 miles) for valve adjustment, fluid changes, etc.

Engine Oil Type:

API SG/SH or JASO MA, SAE 20W-50 or 15W-50 motorcycle-specific oil (exact BMW recommendation in manual)

Engine Oil Capacity:

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

Brake Fluid Type:

DOT 4 (or DOT 5.1 if specified for ABS II systems) - ISO 4925

Coolant Type:

Ethylene glycol based coolant with corrosion inhibitors (BMW recommendation in manual, typically blue or green)

Common Issue 1:

Leaking final drive seals

Common Issue 2:

ABS II system sensor failures or pump issues

Common Issue 3:

Fuel injector issues or vacuum leaks in the intake system

Common Issue 4:

Aging electrical connectors and wiring harness degradation

Common Issue 5:

Clutch slave cylinder seals can degrade over time

Common Issue 6:

Fork seal leaks are common with age and mileage

📚 Vehicle History

Bmw Motorrad Legacy:

BMW Motorrad's reputation for engineering excellence, durability, and touring capability

K Series Introduction:

The K1100 was an evolution of the K100, featuring a 4-valve per cylinder engine for improved performance and refinement

Lt Vs Rs:

The LT (Luxus Touren) variant was designed for long-distance touring with a full fairing, luggage, and comfortable ergonomics, while the RS (Rennsport) was a sport-touring variant with a more aggressive riding position and a smaller fairing.

Production Years:

1991-1999 (K1100LT) / 1992-1996 (K1100RS)

Manufacturing Location:

Berlin, Germany (BMW Motorrad Plant)

🏆 Awards & Recognition

Reputation:

Highly regarded for their robust construction, reliability, and long-distance touring capabilities; considered modern classics