Model:
K1100 LT / K1100 RS
Model Designation:
K1100LT (Touring), K1100RS (Sport Touring)
Applicable Model Years:
1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
Positioning:
Premium sport-touring and touring motorcycles offering advanced technology and performance for their era.
Competitors:
Rivaled other high-performance touring motorcycles from Japanese and European manufacturers, emphasizing comfort, technology, and engineering.
Engine Type:
Inline-four cylinder, liquid-cooled, Boxer-inspired cylinder orientation for a low center of gravity.
Drivetrain Type:
Shaft drive for low maintenance and smooth power delivery.
Frame Technology:
Integral frame concept, often referred to as 'Trevirius' frame for its rigidity and integration with the powertrain.
Suspension Technology:
Paralever rear suspension for reduced torque reaction and improved ride quality.
Electronics Engine:
Advanced for its time, featuring Bosch Motronic fuel injection and electronic ignition.
Touring Features Lt:
Integrated fairing, luggage system, comfortable ergonomics for long-distance riding.
Sport Features Rs:
More aggressive riding position, aerodynamic fairing for sporty performance.
Engine:
1100cc inline-four cylinder (details within)
Fuel System:
Bosch Motronic fuel injection system
Ignition System:
Electronic ignition
Transmission:
5-speed manual gearbox
Electrical System:
Wiring diagrams, charging system, lighting, starting system
Brakes:
Front and rear disc brakes (ABS may be covered)
Suspension:
Front telescopic forks, rear monoshock (paralever system)
Chassis And Frame:
Steel frame, bodywork components
Wheels And Tires:
Specifications and maintenance
Cooling System:
Liquid-cooled engine
Exhaust System:
Maintenance and inspection
Maintenance:
Scheduled maintenance, oil changes, filter replacements, tune-ups
Troubleshooting:
Diagnostic procedures for common issues
Repair:
Step-by-step instructions for component overhaul and replacement
Disassembly And Assembly:
Detailed instructions with exploded views
Engine Rebuild:
Engine internal component repair and overhaul
Electrical Diagnostics:
Wiring diagram interpretation and fault finding
Brake System Service:
Pad replacement, fluid bleeding, ABS diagnostics (if applicable)
Suspension Adjustment And Overhaul:
Fork seal replacement, shock absorber service
Depth:
Comprehensive, from basic maintenance to complete engine rebuilds and advanced diagnostics
Detail Level:
Step-by-step instructions, exploded diagrams, torque specifications, wiring schematics
Engine Type:
Inline-four cylinder, four-stroke
Displacement:
1093 cc (1093cc)
Bore X Stroke:
72 mm x 67.5 mm
Compression Ratio:
10.0:1
Valve Train:
DOHC, 4 valves per cylinder
Horsepower:
Approx. 95-100 hp (depending on specific model and tuning)
Torque:
Approx. 90-95 Nm (depending on specific model and tuning)
Fuel Delivery:
Bosch Motronic electronic fuel injection
Fuel Type:
Unleaded gasoline, minimum 91 RON (87 AKI)
Fuel Tank Capacity:
21 liters (5.5 US gallons)
Ignition Type:
Electronic (fully mapped ignition)
Cooling Method:
Liquid-cooled
Type:
5-speed constant mesh manual gearbox
Clutch Type:
Wet multi-plate clutch
Gear Ratios:
Specific gear ratios detailed in the manual
Gearbox Oil Type:
API GL-5, SAE 80W-90 (BMW recommended or equivalent)
Gearbox Oil Capacity:
Approx. 1.5 liters (for gearbox and final drive, check manual for specific split)
Safety Systems:
Optional ABS (Anti-lock Braking System) available on some models.
Braking System:
Dual disc front brakes, single disc rear brake.
Lighting:
Halogen headlights, integrated turn signals.
Frame Design:
Integral frame design contributes to overall structural integrity.
Audio System Lt:
Many K1100LT models came equipped with integrated audio systems, including radio and cassette player (later models may have CD changers).
ABS System:
Optional ABS II system available, enhancing braking safety.
Diagnostic Ports:
Diagnostic connectors for service technicians to interface with the Motronic system.
Oil Change Interval:
Typically every 10,000 km (6,000 miles) or annually, whichever comes first (refer to manual for exact specification).
Major Service Interval:
Often around 20,000 km (12,000 miles) for valve clearance checks and detailed inspections (refer to manual).
Engine Oil Type:
BMW Motorrad Recommended Synthetic or Semi-Synthetic Motorcycle Oil, SAE 20W-50 or 15W-50 (refer to manual for exact grade based on climate).
Engine Oil Capacity:
Approx. 4.0 liters (with filter change)
Coolant Type:
BMW Motorrad approved coolant (Ethylene glycol based, with corrosion inhibitors) mixed 50/50 with distilled water.
Brake Fluid Type:
DOT 4 brake fluid.
Common Wear Items:
Ignition coil failures, fuel pump issues, clutch slave cylinder leaks, suspension wear.
Electrical Gremlins:
Can sometimes occur due to age and vibration; thorough inspection of wiring harness and connections is crucial.
Fuel Injection Maintenance:
Regular cleaning of injectors and throttle bodies recommended for optimal performance.
Heritage:
BMW Motorrad, renowned for engineering excellence, durability, and innovation in motorcycle design since the early 20th century.
Predecessor:
K100 series (K100LT, K100RS, K100RT).
Successor:
K1200LT, K1200RS series.
Production Period:
1991-1999
Manufacturing Location:
Berlin, Germany (BMW Motorrad factory)
Market Reception:
Praised for its comfortable ride, robust build quality, and advanced engineering, cementing BMW's reputation in the touring segment.
Review Consensus:
Consistently received positive reviews from motorcycle publications for its performance, comfort, and durability.
