BMW K100 (1983 – 85)

BMW K100 (1983 - 85)

In the late 1970s, BMW faced a daunting challenge: reviving its struggling motorcycle division. But the Bavarian manufacturer’s determination and innovative spirit soon paid off. The result was the K100, a revolutionary motorcycle born from the ashes of failed experiments and inspired by a bold new concept.

The K100’s engine, a water-cooled inline-four, was a departure from BMW’s traditional boxer configuration. With a cubic capacity of up to 1000cc and 90 horsepower, this potent powerplant delivered exceptional performance and responsiveness. Its smooth, even torque and high-revving capabilities made it an absolute delight to ride.

The K100’s longitudinal engine design presented unique challenges, but BMW’s engineers successfully adapted the concept to create a bike that was both elegant and efficient. With its streamlined bodywork and sporty stance, the K100 was an instant hit with enthusiasts and critics alike. With its razor-sharp handling and thrilling acceleration, it’s no wonder the K100 quickly became a benchmark for high-performance motorcycles, cementing BMW’s reputation as a leader in the industry.

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
Fuel Tank Capacity22 Liters / 5.8 US gal
Weight (Wet/Kerb)527 lbs / 239 kg
Seat Height31.90 inches / 810 mm
BMW K100 (1983 - 85)

All Specifications

Make & Model

ModelBMW K100
Year1983 – 85

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
Engine Management SystemElectronic injection, Bosch LE-Jetronic
Lubrication SystemWet sump
Cooling SystemLiquid cooled
ExhaustRust resistant steel, 4 into 1

Performance

Top Speed216.3 km/h / 124.4 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) Weight527 lbs / 239 kg

Features

  • Longitudinally disposed four-cylinder engine
  • In-line engine with benefits of a boxer engine
  • Low center of gravity
  • Direct shaft drive
  • Easy maintenance
  • Production is relatively inexpensive
  • Can produce more performance than a boxer engine
  • Cubic capacity of up to 1000cc
  • 90 PS / 66 kW power output
  • Good and even torque
  • Water-cooled
  • Inline four-cylinder
  • Flanged to a BMW boxer gearbox
  • Engine designed for use in motorcycles and cars
  • Engine can be used with a cubic capacity of up to 1300cc
  • Hand-built engine
  • Engine designed with accessibility in mind
BMW K100 (1983 - 85)
BMW K100 (1983 - 85)

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