Model Variant:
K 100 RS, K 100 RT, K 100 LT, K 100
Product Name:
BMW K 100 1983-1992 Workshop Service Repair Manual PDF
Chassis Codes:
K100 (Standard), K100RS, K100RT, K100LT
Market Segment:
Sport touring motorcycle segment. Known for its inline-four engine, shaft drive, and long-distance comfort.
Competitors:
Honda CBX750, Yamaha FJ1100/1200, Kawasaki GTR1000
Engine Layout:
Transverse-mounted, liquid-cooled, inline-four cylinder
Drivetrain:
Shaft drive, eliminating chain maintenance
Technology:
Early adoption of electronic fuel injection (Bosch Motronic) and often ABS (on later models), setting it apart from many contemporaries.
Years Covered:
1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992
Estimated Pages:
Extensive (typical workshop manuals for this era are 500+ pages)
Type:
Workshop Service Repair Manual
Language:
English (Primary, based on common industry practice for international manuals)
Engine:
Complete overhaul, assembly, disassembly, diagnostics, tuning, cooling system, lubrication system, fuel injection system (Bosch Motronic)
Transmission:
Clutch operation, gearbox assembly, disassembly, maintenance, troubleshooting, final drive, shaft drive
Electrical System:
Ignition system, charging system (alternator, battery), starting system, lighting, instrumentation, wiring diagrams, ECU diagnostics
Chassis And Suspension:
Front forks (telescopic), rear suspension (Monolever), frame, steering head bearings, wheel bearings, swingarm
Braking System:
Front and rear brake calipers, master cylinders, brake lines, ABS system (if equipped on later models), brake fluid specifications and bleeding procedures
Fuel System:
Fuel tank, fuel pump, fuel injectors, fuel pressure regulator, fuel filter replacement
Body And Fairings:
Fairing removal and installation, seat, tank cover, body panel fasteners, storage compartments (LT model)
Maintenance:
Oil changes, filter replacements, spark plug replacement, valve clearance adjustments, brake pad replacement, coolant flush, fork oil change
Troubleshooting:
Step-by-step diagnostic guides for common issues, electrical fault finding, engine performance problems, starting issues
Repair:
Detailed instructions for engine rebuilds, transmission overhauls, suspension component replacement, brake system repairs, electrical component repairs
Diagnostics:
Engine control unit (ECU) code reading (if applicable), sensor testing, system checks
Depth:
Comprehensive, covering basic maintenance to full engine and transmission rebuilds. Includes detailed torque specifications and tolerances.
Type:
Four-stroke, inline-four cylinder
Displacement:
987 cc (99 cc bore x 64.5 mm stroke)
Compression Ratio:
10.2:1
Power Output:
90 hp (67 kW) at 8,250 rpm (approximate, varies slightly by model variant)
Torque:
81 Nm (59.7 lb-ft) at 6,750 rpm (approximate)
Top Speed:
Over 200 km/h (125 mph)
Induction:
Bosch LE-Jetronic fuel injection
Fuel Type:
Unleaded gasoline, premium octane recommended
Length:
Approx. 2220-2300 mm (varies by model variant, e.g., LT is longer)
Width:
Approx. 750-900 mm (varies by model variant, fairing width)
Height:
Approx. 1220-1400 mm (varies by model variant, fairing height)
Dry Weight:
Approx. 230-250 kg (varies by model variant)
Wet Weight:
Approx. 245-270 kg (varies by model variant)
Fuel Capacity:
21 liters (including 3-liter reserve)
Crash Test Results:
N/A (Motorcycle safety ratings are not comparable to automotive; focus is on design integrity and rider protection features).
ABS:
Optional anti-lock braking system (ABS) available on later models, particularly the K100LT and some K100RS variants.
Braking System:
Dual front disc brakes, single rear disc brake. High-performance braking typical of BMW.
Frame Construction:
Steel tube frame, designed for rigidity and rider safety.
Lighting:
Halogen headlight, LED taillight (on some later models).
Instrumentation:
Analog speedometer and tachometer, fuel gauge, temperature gauge, warning lights (oil pressure, battery, neutral, high beam, turn signals).
ABS:
Availability of ABS on certain models as a significant technological advancement for its time.
Diagnostics:
Early use of electronic diagnostics for the fuel injection and ignition systems via the Bosch Motronic unit.
Oil Change:
Every 10,000 km or annually, whichever comes first.
Valve Adjustment:
Every 20,000 km (adjustments via shims).
Brake Fluid:
Change every 2 years.
Engine Oil:
SAE 20W-40 or 20W-50 API SF or SG. Capacity: 4.5 liters with filter change.
Coolant:
BMW recommended ethylene glycol coolant mixture (50/50 with distilled water). Capacity: Approx. 2.5 liters.
Final Drive Oil:
SAE 80W-90 API GL-5. Capacity: 0.25 liters.
Electrical:
Age-related degradation of wiring insulation, regulator/rectifier issues, starter solenoid problems.
Engine:
Potential for oil leaks from engine seals and covers. Fuel injector issues can arise with age. Overheating if cooling system is neglected.
Suspension:
Worn fork seals, rear shock absorber degradation over time. Monolever drive shaft U-joint wear is uncommon but possible.
Fuel System:
Clogged fuel filters, aging fuel pump diaphrams.
Brand Origins:
Bayerische Motoren Werke AG (BMW), founded in 1916, with a long history in aircraft engines, automobiles, and motorcycles.
Introduction:
The K 100 series marked a significant departure for BMW, introducing a horizontally mounted, shaft-driven inline-four engine, a contrast to their traditional boxer-twin layout.
Variants:
Launched initially as the K 100 (naked), followed by the faired K 100 RS (Rennsport), the touring-focused K 100 RT (Reise-Touring), and the fully-equipped K 100 LT (Luxus-Touring).
Manufacturing Location:
Berlin-Spandau, Germany
Production Period:
1983 - 1992 (as covered by this manual)
