Positioning:
The K1100 LT and RS represented BMW's premium touring and sport-touring offerings of their era, known for their robust inline-four engines and distinctive 'Flying Brick' design.
Competitors:
Competed with other large-displacement touring and sport-touring motorcycles from manufacturers like Honda (e.g., ST1100), Kawasaki (e.g., GTR1000), and Yamaha (e.g., FJ1200).
Bike Features:
K1100 LT: Focused on comfortable touring with extensive fairing, integrated luggage. K1100 RS: Sportier variant with a more aggressive riding position and often a more performance-oriented fairing. Both featured the innovative transverse-mounted inline-four engine and shaft drive.
Systems Covered:
Engine, Fuel System, Ignition System, Transmission, Clutch, Drivetrain, Suspension, Brakes, Electrical System, Bodywork, Frame, Cooling System, Exhaust System, Wheels & Tires, Instrumentation, Controls
Type:
Comprehensive Service and Repair Manual
Page Count Detail:
364 pages of detailed information, ensuring thorough coverage of all aspects of the motorcycle.
Engine Mechanical:
Detailed overhaul procedures for the K1100 inline four-cylinder engine, including cylinder head, valves, pistons, crankshaft, connecting rods, oil pump, and timing components.
Fuel System:
Component identification, troubleshooting, and repair for the Bosch Motronic fuel injection system, fuel pump, injectors, fuel pressure regulator, and throttle body.
Ignition System:
Diagnosis and repair of the electronic ignition system, including ignition coils, crank position sensor, and ECU.
Transmission Clutch:
Service and repair for the 5-speed sequential gearbox, clutch actuation system (hydraulic), and clutch assembly.
Drivetrain:
Maintenance and repair of the shaft drive system, including driveshaft, universal joint, final drive unit, and associated bearings.
Suspension:
Front fork (telescopic, possibly with electronic damping for RS) and rear monoshock suspension servicing, including fork oil changes, seal replacement, and shock absorber inspection.
Brakes:
Detailed procedures for servicing the front and rear braking systems, including ABS (if equipped), brake caliper overhaul, pad replacement, fluid flushing, and master cylinder maintenance.
Electrical System:
Wiring diagrams, component testing, troubleshooting of the lighting, starting, charging, and instrument cluster systems. Includes ECU diagnostics and sensor testing.
Cooling System:
Maintenance and repair of the liquid-cooled system, including radiator, water pump, thermostat, and coolant hose replacement.
Exhaust System:
Inspection and component replacement for the exhaust system.
Bodywork Frame:
Information on fairing removal/installation, seat, fuel tank, and chassis components. Frame inspection and repair guidelines.
Maintenance:
Scheduled maintenance tasks, oil changes, filter replacements, spark plug service, brake fluid replacement, coolant flushes, valve clearance checks.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon faults, including fault code interpretation (if applicable) and electrical system diagnostics.
Repair Overhaul:
Step-by-step instructions for complete engine rebuilds, transmission overhauls, suspension component replacement, brake system overhauls, and electrical component repair.
Installation Adjustment:
Procedures for installing and adjusting various components, such as clutch cable (if applicable), levers, and suspension settings.
Engine Rebuild:
Detailed steps for complete engine disassembly, inspection, repair, and reassembly, including torque specifications and clearances.
Electrical Troubleshooting:
Includes detailed wiring diagrams and diagnostic flowcharts for troubleshooting electrical issues.
Depth:
Comprehensive from basic maintenance to complete engine and transmission rebuilds. Includes detailed diagnostic procedures for electronic systems.
Diagrams Illustrations:
Features step-by-step instructions accompanied by exploded view diagrams for clarity on component relationships and assembly sequences.
Diagnostic Tools:
While not covering advanced electronic scan tools of today, it details the necessary electrical measurements, multimeter usage, and component testing methods.
Type:
Liquid-cooled, four-stroke, inline four-cylinder
Bore X Stroke:
77.6 mm x 75 mm
Compression Ratio:
10.0:1
Valve Train:
DOHC, 4 valves per cylinder
Horsepower:
Approx. 100-109 hp @ 7500-8000 rpm (depending on model variant and tuning)
Torque:
Approx. 107 Nm (79 lb-ft) @ 5500 rpm
Fuel Delivery:
Bosch Motronic electronic fuel injection (EFI)
Fuel Type:
Unleaded gasoline, 95 RON recommended
Throttle Control:
Mechanical throttle linkage with fuel injection.
Ignition Type:
Electronic ignition with crank position sensor
Cooling Medium:
Liquid (antifreeze/water mixture)
Oil Type:
SAE 20W-50 or 10W-40 motorcycle oil meeting API SG or higher classification. Specific BMW approval may be recommended (e.g., BMW Special Plus).
Oil Capacity:
Approx. 4.0-4.5 liters (with filter change)
Oil Change Interval:
Every 10,000 km (6,000 miles) or annually, whichever comes first.
Valve Clearance Check:
Every 20,000 km (12,000 miles).
Spark Plug Replacement:
Every 20,000 km (12,000 miles).
Brake Fluid Flush:
Every 2 years.
Coolant:
Mixture of distilled water and a quality ethylene glycol-based antifreeze (e.g., BMW Motorrad Coolant or equivalent) to protect down to -30°C (-22°F).
Brake Fluid:
DOT 4 brake fluid.
Transmission Oil:
GL-5 SAE 75W-90 or SAE 80W-90 gear oil for the transmission, and SAE 90 for the final drive.
Common Problems:
While generally robust, common areas for attention can include the fuel pump relay, aging rubber components (hoses, seals), potential ABS modulator issues (though often repairable), and the universal joint on the shaft drive can require periodic inspection/lubrication.
Maintenance Focus:
Emphasis on regular fluid changes, checking electrical connections, and proper maintenance of the fuel injection system.
