BMW K 75 (1985 – 86)

BMW K 75 (1985 - 86)

The BMW K75, a revolutionary triple-cylinder marvel, has emerged from the heart of Germany to challenge the dominance of Europe’s most successful indigenous four. With its incredible smoothness, rapid acceleration, and crisp handling, this bike redefines the riding experience. The K75’s inline engine, featuring a longitudinal crankshaft and a unique second engine output shaft, delivers power to the wheels with a distinct character that sets it apart from its rivals. Its fuel injection system, monoshock suspension, and aluminum fuel tanks showcase BMW’s innovative spirit and commitment to advanced technology. The K75 is not just a scaled-down K100, but a bold new creation that embodies the essence of the K-bikes’ eccentric genius.

The K75’s distinctive personality shines through in every aspect of its design and engineering. From its combustion chambers to its ignition curve, suspension, and fuel delivery, every detail has been carefully crafted to create a truly unique riding experience. The bike’s longitudinal crankshaft and parallel engine output shaft ensure a smooth power delivery, while its fuel injection system provides precise control over the engine’s performance.

In the hands of an experienced rider, the K75 comes alive, its agility and responsiveness making it a joy to navigate twisty roads and urban streets alike. With its low center of gravity and precise handling, this bike is a masterclass in motorcycling dynamics. Whether you’re a seasoned rider or just starting out, the BMW K75 is a machine that will captivate and inspire you with its unparalleled character and performance. It is, without a doubt, one of the most exciting motorcycles to emerge from the world of BMW.

Key Specifications

Engine TypeFour-stroke, horizontal three cylinder in-line, DOHC, 2 valves per cylinder
Engine Capacity740 cc / 45 cub-in
Max Power55 kw / 75 hp
Max Torque68 Nm / 6.9 kgf-m / 50 ft lb @ 6750 rpm
Fuel Tank Capacity5.54 US gallons / 21.0 L
Weight (Wet/Kerb)520 lbs / 236 kg
Seat Height31.9 inches / 810 mm
BMW K 75 (1985 - 86)

All Specifications

Make & Model

ModelBMW K 75
Year1985 – 86

Engine

Engine TypeFour-stroke, horizontal three cylinder in-line, DOHC, 2 valves per cylinder
Displacement740 cc / 45 cub-in
Bore x Stroke67 x 70 mm
Compression Ratio11.0:1
Max Horsepower55 kw / 75 hp
Max Torque68 Nm / 6.9 kgf-m / 50 ft lb @ 6750 rpm
Engine Management SystemElectronic injection, Bosch LE-Jetronic
Lubrication SystemWet sump

Performance

Top Speed196 km/h / 122 mph

Transmission

ClutchSingle dry plate
Gearbox5 Speed
Gear Ratios1st 4.50 / 2nd 2.96 / 3rd 2.30 / 4th 1.88 / 5th 1.67:1

Electrical & Electronics System

StarterElectric

Chassis & Suspension

Frame TypeDouble-downtube frame with engine as a stressed member; box-section aluminum monolever swing arm.
Front SuspensionTelescopic fork with hydraulic shock absorber.
Front Suspension Travel7.3 inches / 185 mm
Rear SuspensionMonolever swinging arm.
Rear Suspension Travel4.5 inches / 114 mm

Wheels & Brakes

Front Tire Size100/90-18 56H
Rear Tire Size120/90-18 56H
Front Brakes2 x 285mm discs, 2 piston calipers
Rear BrakesSingle 285mm disc

Dimension & Weights

Overall Length2220 mm / 87.4 in
Overall Width900 mm / 35.4 in
Overall Height1300 mm / 51.2 in
Seat Height31.9 inches / 810 mm
Fuel Tank Capacity5.54 US gallons / 21.0 L
Wet (kerb/curb) Weight520 lbs / 236 kg

Features

  • Longitudinal crankshaft transmits power to a second engine output shaft
  • Second engine output shaft lies parallel to the crank
  • Crank web cut as a helical-toothed gear meshes with clutch drive
  • Output shaft drives oil pump and water pump
  • Bosch LE/Jetronic fuel injection feeds each cylinder at its intake port
  • Overrev protection at 8777 rpm via ignition retard
  • Overrev protection at 8905 rpm via fuel injection cutout
  • Engine and transmission/monolever rear suspension bolt together
  • Compact Drive System patented by BMW
  • Space frame carries steering head and upper shock mount
  • Fuel injection cuts out at 8905 rpm
  • Ignition retard at 8777 rpm
  • Fuel capacity 18 liters
  • Dry weight 24 pounds less than K100
  • Wet weight 59 pounds less than K100
  • 1000cc engine displacement
  • Inline engine flopped on its side
  • Automotive-styled power-plant
BMW K 75 (1985 - 86)
BMW K 75 (1985 - 86)

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