BMW K100 LT (1986)

BMW K100 LT (1986)

BMW’s bold move into four-cylinder territory with the K100 LT marked a significant shift in the company’s design philosophy. Departing from the traditional boxer engine, BMW aimed to harness the benefits of modern techniques while retaining the essence of their iconic motorcycles. The K100 LT’s inline-four engine, positioned lengthwise, offered a unique blend of advantages: low center of gravity, reliable shaft drive, and exceptional accessibility. This innovative design also enabled the engine to produce more power while remaining economical to build and manage.

The K100 LT’s engine character is a perfect blend of refinement and power, providing a smooth and linear power delivery that’s well-suited for both touring and everyday riding. The LT’s touring-oriented features, including a large fairing and comfortable seat, make it an excellent choice for long-distance travel.

As one of the first production motorcycles to adopt a four-cylinder engine, the BMW K100 LT was a pioneering effort in motorcycle design. With its unique blend of performance, comfort, and innovation, it’s no wonder the K100 LT has become a beloved classic among motorcyclists. And with its reputation as a reliable and durable machine, it’s clear that the K100 LT has left a lasting legacy in the world of motorcycling, standing as a testament to BMW’s commitment to innovative design and exceptional engineering.

Key Specifications

Engine TypeFour stroke, horizontal in line four cylinder, DOHC, 2 valves per cylinder
Engine Capacity987 cc / 60.2 cub. in
Max Power65.6 kw / 90 hp
Max Torque86 Nm / 8.8 kgf-m / 63 ft-lb @ 6000 rpm
Fuel Tank Capacity22 Liters / 5.8 US gal
Weight (Wet/Kerb)558 lbs / 253 kg
Seat Height31.90 inches / 810 mm
BMW K100 LT (1986)

All Specifications

Make & Model

ModelBMW K100 LT
Year1986

Engine

Engine TypeFour stroke, horizontal in line four cylinder, DOHC, 2 valves per cylinder
Displacement987 cc / 60.2 cub. in
Bore x Stroke67 x 70 mm
Compression Ratio10.2:1
Max Horsepower65.6 kw / 90 hp
Max Torque86 Nm / 8.8 kgf-m / 63 ft-lb @ 6000 rpm
Engine Management SystemElectronic injection, Bosch LE-Jetronic
Lubrication SystemWet sump
Cooling SystemLiquid cooled
ExhaustStainless steel, 4 into 1

Performance

Top Speed213 km/h / 132 mph

Transmission

ClutchDry, single plate, cable operated
Gearbox5 Speed
Gear Ratios1st 4.50 / 2nd 2.96 / 3rd 2.30 / 4th 1.88 / 5th 1.61:1
Final DriveShaft

Electrical & Electronics System

Battery20Ah
StarterElectric

Chassis & Suspension

Frame TypeTubular space frame, engine serving as load bearing component
Front SuspensionTelescopic fork with hydraulic shock absorber
Front Suspension Travel7.3 inches / 185 mm
Rear SuspensionMonolever swinging arm
Rear Suspension Travel4.3 inches / 110 mm

Wheels & Brakes

WheelsAlloy, 8 spoke
Front Wheel/Rim Size2.50 x 18 MT H 2
Front Tire Size100/90-18
Rear Wheel/Rim Size2.75 x 17 MT H 2
Rear Tire Size130/90-17
Front Brakes2 x ∅285 mm discs, 2 piston calipers
Rear BrakesSingle ∅285 mm disc, 1 piston caliper

Dimension & Weights

Seat Height31.90 inches / 810 mm
Wheelbase1516 m /59.7 in.
Ground Clearance175 mm / 6.9 in.
Fuel Tank Capacity22 Liters / 5.8 US gal
Wet (kerb/curb) Weight558 lbs / 253 kg

Features

  • 4-cylinder engine in a flat configuration
  • Shaft drive
  • Low center of gravity
  • Easy accessibility of the engine
  • 4-cylinder can easily obtain more power
  • Economical to build
  • Manageable noise level
  • Rigid engine as part of the motorcycle frame
  • Compact Drive System engine concept
  • Patented technology
  • Fuel injection system
  • Manual adjustable timing
  • Temporary exhaust
  • Aluminum engine
  • Water-cooled engine
  • Gearbox connected to the engine
BMW K100 LT (1986)
BMW K100 LT (1986)
BMW K100 LT (1986)

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