Positioning:
Essential tool for owners and technicians of the BMW K100LT and K1100RS models, enabling self-sufficiency in maintenance and repair.
Advantage:
Provides factory-level information, covering specific model years and variants, often exceeding the detail found in generic motorcycle repair manuals.
Completeness:
Every service and repair job is covered, emphasizing its utility for virtually any maintenance or repair task.
Usability:
Aimed at enabling users to perform repairs themselves ('YOU CAN GET THAT REPAIR DONE TODAY!'), promoting cost savings and a deeper understanding of the machine.
Format Benefit:
PDF format allows for quick access, digital searching, and printing of relevant sections for workshop use.
Engine:
Complete engine overhaul, including cylinder head, valve train, crankshaft, pistons, connecting rods, timing system, and lubrication.
Fuel System:
Fuel injection system (Bosch Motronic), fuel pump, injectors, fuel lines, fuel tank, and evaporative emissions control.
Ignition System:
Electronic ignition system, coils, spark plugs, and ECU control.
Transmission:
Gearbox overhaul, clutch operation, shifting mechanism, and final drive (driveshaft and bevel gear).
Brakes:
Front and rear brake systems, hydraulic lines, master cylinders, calipers, brake pads, brake discs, ABS system (where applicable).
Suspension:
Front fork (telescopic, conventional or inverted depending on sub-model variant), rear monoshock suspension, linkages, and adjustable damping.
Electrical System:
Wiring diagrams, battery, alternator, starter motor, lighting, instruments, control units (ECU, ABS), and accessory circuits.
Frame And Bodywork:
Chassis, frame integrity, body panels, fairings, seat assembly, fuel tank mounting, and fairing repair.
Cooling System:
Liquid cooling system, radiator, coolant hoses, water pump, thermostat, and fan operation.
Exhaust System:
Exhaust headers, mufflers, catalytic converter (if fitted), and lambda sensor operation.
Controls:
Throttle controls, clutch lever, brake levers, shift lever, and cable adjustments.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, spark plug checks, chain/driveshaft inspection, brake fluid flushes, coolant changes, and general inspections.
Troubleshooting:
Diagnostic procedures for common and uncommon faults, error code interpretation (if applicable), and systematic problem-solving guides.
Repair:
Step-by-step instructions for disassembly, component replacement, reassembly, and torquing specifications for virtually all mechanical and electrical components.
Engine Rebuild:
Detailed procedures for engine disassembly, inspection of wear components (pistons, rings, bearings, valves), cylinder honing, and engine reassembly with precision measurements.
Electrical Diagnostics:
Testing of sensors, actuators, wiring integrity, and ECU functions. Use of multimeters and oscilloscopes.
ABS System:
Diagnosis and repair of the Anti-lock Braking System, including sensor checks and hydraulic unit troubleshooting.
Suspension Tuning:
Adjustment procedures for suspension damping and preload for optimal handling characteristics.
Depth:
Comprehensive (covering everything from basic maintenance to full engine and transmission rebuilds, including electrical system diagnostics).
Detail Level:
Factory specifications, torque values, clearance measurements, and diagnostic flowcharts.
Diagnostic Focus:
Detailed diagnostic information, including common issues and solutions for the K-series fuel injection and electrical systems.
Type:
Inline Four-cylinder, four-stroke
K100 Displacement:
987 cc (98.7 cu in)
K1100 Displacement:
1093 cc (109.3 cu in)
Bore X Stroke K100:
67 mm x 70 mm
Bore X Stroke K1100:
70.5 mm x 70 mm
Compression Ratio K100:
10.2:1
Compression Ratio K1100:
10.5:1
Valve Actuation:
DOHC, 2 valves per cylinder (early models), 4 valves per cylinder (K1100RS)
K100 Horsepower:
Approx. 90 hp @ 8200 rpm
K1100 Horsepower:
Approx. 100 hp @ 8000 rpm
K100 Torque:
Approx. 95 Nm (70 lb-ft) @ 6000 rpm
K1100 Torque:
Approx. 107 Nm (79 lb-ft) @ 6000 rpm
Injection System:
Bosch Motronic Electronic Fuel Injection (EFI)
Fuel Type:
Unleaded gasoline, minimum 95 RON
Fuel Capacity:
Approx. 21 liters (5.5 US gal)
Fuel Pump Type:
Electric, in-tank
Oil Change Interval:
Typically every 5,000-10,000 km (3,000-6,000 miles) or annually, refer to manual for precise recommendation.
Spark Plug Replacement:
Check/replace every 10,000-20,000 km (6,000-12,000 miles).
Brake Fluid Flush:
Every 2 years.
Coolant Change:
Every 2-3 years.
Engine Oil Spec:
SAE 20W-50 or 10W-40 (API SG/SH or higher) - refer to manual for specific BMW recommendation.
Engine Oil Capacity:
Approx. 4.5 liters (4.7 US qt) with filter change.
Coolant Type:
Ethylene glycol based antifreeze mixture with corrosion inhibitors (BMW blue or equivalent).
Fuel Pump Reliability:
Early models may experience fuel pump wear; replacement often required around higher mileage.
Stator Failure:
Alternator stator can fail over time, affecting charging system. Diagnosis and replacement are common procedures.
ABS Sensor Issues:
ABS wheel speed sensors can become dirty or fail, leading to ABS warning lights.
Electrical Connector Corrosion:
Corrosion in electrical connectors, particularly on older models, can cause intermittent faults. Cleaning and dielectric grease application is recommended.
Clutch Slave Cylinder Leaks:
The clutch slave cylinder can develop leaks, affecting clutch operation.
Heritage:
BMW Motorrad's reputation for engineering excellence, durability, and advanced technology.
K Series Introduction:
The K-series, introduced in the early 1980s, represented a significant departure from BMW's boxer-twin tradition, utilizing a transverse inline-four engine with shaft drive.
K100 Development:
The K100 was the first of the K-series, initially featuring 2 valves per cylinder. The LT (Lux Transformer) was a touring-oriented variant.
K1100 Development:
The K1100RS built upon the K100 platform, featuring an enlarged 1093cc engine, 4 valves per cylinder, and a sportier, more aerodynamic fairing. ABS became a prominent feature.
Production Period K100Lt:
Mid-1980s to mid-1990s (specific variants evolved).
Production Period K1100Rs:
Early 1990s to late 1990s.
