Segment:
Luxury Sport Touring Motorcycle
Vehicle Type K100Lt:
Full-dress touring motorcycle with extensive fairing and luggage
Vehicle Type K1100Rt:
Sport-touring motorcycle with improved performance and ABS II
Manual Purpose:
Empower owners and technicians for self-sufficiency in maintenance and repair
Engine Mechanical:
Full overhaul, valve clearance, timing, lubrication system
Fuel System:
EFI system, fuel pump, injectors, throttle body, pressure regulator
Ignition System:
Motronic ECU, sensors, ignition coils, spark plugs
Transmission:
Clutch assembly, gearbox, final drive (spline lubrication)
Brakes:
ABS II (K1100RT), hydraulic system, caliper overhaul, pad replacement, fluid flush
Suspension:
Front forks (oil change, seal replacement), rear monoshock (adjustment, rebuild)
Electrical System:
Wiring diagrams, battery, charging system, lighting, starter, Motronic ECU diagnostics
Bodywork:
Fairing removal and installation, seat, luggage systems (LT)
Maintenance:
Scheduled servicing, oil changes, filter replacements, brake fluid service
Diagnostics:
Troubleshooting guides, error codes (Motronic), component testing
Repair:
Component overhaul, replacement of wear items, specific system repairs
Rebuilding:
Engine rebuild procedures, gearbox overhaul
Depth:
Comprehensive (from basic maintenance to full engine rebuilds)
Engine Type K100Lt:
Four-stroke inline four-cylinder, longitudinally mounted
Engine Displacement K100Lt:
987 cc (99.2 x 64.5 mm bore x stroke)
Engine Type K1100Rt:
Four-stroke inline four-cylinder, longitudinally mounted
Engine Displacement K1100Rt:
1093 cc (74.5 x 63.4 mm bore x stroke)
Horsepower K100Lt:
90 hp (67 kW) @ 8,200 rpm
Torque K100Lt:
83 Nm (61 lb-ft) @ 6,750 rpm
Horsepower K1100Rt:
100 hp (74 kW) @ 7,500 rpm
Torque K1100Rt:
102 Nm (75 lb-ft) @ 5,750 rpm
Fuel Injection Type:
Bosch Motronic (K100LT) / Bosch Motronic 2.2 (K1100RT)
Fuel Type:
Unleaded gasoline, premium octane rating
Fuel Tank Capacity:
21 liters (5.5 US gal)
Cooling Method:
Liquid-cooled
Audio System K100Lt:
Optional integrated radio/cassette player with handlebar controls on some models.
Instrumentation:
Analog gauges (speedometer, tachometer), fuel gauge, voltmeter, oil pressure warning light, clock.
ABS K1100Rt:
Advanced for its era, ABS II provided significant safety improvements during braking.
Diagnostic Ports:
Specific diagnostic connectors for Motronic system troubleshooting.
Oil Change Interval:
Typically every 5,000-10,000 km or annually, refer to manual for precise interval.
Valve Check Interval:
Every 20,000-30,000 km
Engine Oil Grade:
Refer to manual; typically SAE 15W-50 or 20W-50 synthetic motorcycle oil.
Coolant Type:
Ethylene glycol based coolant with corrosion inhibitors (BMW recommends specific mix).
Brake Fluid Type:
DOT 4 or DOT 5.1 (refer to manual for precise specification, especially for ABS systems).
Common Wear Items:
Clutch wear, fuel pump failure, ABS modulator issues (K1100RT), starter motor bushings, splined shaft lubrication.
Electrical Gremlins:
Corroded connectors, failing relays, and ignition switch issues can occur with age.
Bmw Motorcycle Legacy:
Renowned for engineering excellence, durability, and innovative design in motorcycles since 1923.
K Series Introduction:
The K-series, introduced in 1983 with the K100, marked BMW's first major departure from boxer engines, featuring a transverse, liquid-cooled inline-four.
K100Lt Development:
The 'LT' (Luxus Tourer) variant was a fully dressed touring model derived from the K100, emphasizing comfort and long-distance capability.
K1100Rt Development:
The K1100RT, introduced in 1990, featured an enlarged 1093cc engine, improved aerodynamics, and the advanced ABS II braking system, enhancing performance and safety.
Production Period K100Lt:
Approximately 1986-1991
Production Period K1100Rt:
Approximately 1990-1996
