BMW R 100RS (1984 – 85)

BMW R 100RS (1984 - 85)

The BMW R 100RS is a masterclass in motorcycle design, where function and form blend seamlessly together to create a riding experience like no other. Under its sleek, aerodynamic fairing lies a basic yet robust boxer twin engine, designed for long-haul journeys and capable of redefining road maps with its three-quarter scale touring prowess.

The engine’s air-cooled cylinders fit outside in the airstream, away from the rider, allowing for a more efficient cooling system and a reduced engine compartment. This design choice enables the fairing to surround the engine crankcase, creating a streamlined profile that slices through the wind with ease.

Riding the R 100RS is an exercise in harmony, where the rider is nestled within the fairing’s contours, yet still able to access essential controls and instrumentation. The cockpit’s minimalist approach eschews unnecessary frills, instead focusing on simplicity and unadulterated riding pleasure. This is a motorcycle that rewards those who value substance over flash, and is content with redefining the limits of what’s possible on two wheels.

Key Specifications

Engine TypeFour stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder
Engine Capacity980 cc / 59.8 cub in.
Max Power51 kw / 70 hp
Max Torque76 Nm / 7.75 kgf-m / 56 ft-lb @ 6000 rpm
Fuel Tank Capacity6.3 US gallons / 24.0 L
Weight (Wet/Kerb)506 lbs / 230 kg
Seat Height32.3 inches / 820 mm
BMW R 100RS (1984 - 85)

All Specifications

Make & Model

ModelBMW R 100RS
Year1984 – 85

Engine

Engine TypeFour stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder
Displacement980 cc / 59.8 cub in.
Bore x Stroke94 x 70.6 mm
Compression Ratio9.5:1
Max Horsepower51 kw / 70 hp
Max Torque76 Nm / 7.75 kgf-m / 56 ft-lb @ 6000 rpm
Engine Management System2 x Constant depression carburettors, Bing 94/40/105 – 94/40/106
Lubrication SystemWet sump
Cooling SystemAir cooled

Performance

Top Speed196 km/h / 121.5 mph

Transmission

ClutchDry single plate, with diaphragm spring
Gearbox5 Speed
Gear Ratios1st4.40 / 2nd 2.86 / 3rd 2.07 / 4th 1.67 / 5th 1.50:1
Final DriveShaft

Electrical & Electronics System

StarterElectric

Chassis & Suspension

Frame TypeDouble sown tubs, dual cradle
Front SuspensionTelescopic fork with hydraulic shock absorber.
Front Suspension Travel7.8 inches / 200 mm
Rear SuspensionLong swinging arm with adjustable strut.
Rear Suspension Travel4.9 inches / 125 mm

Wheels & Brakes

Front Wheel/Rim Size2.15 – B19
Front Tire Size3.25 – H19
Rear Wheel/Rim Size2.50 – B18
Rear Tire Size4.00 – H18
Front Brakes2 x ∅260mm discs, 2 piston calipers
Rear BrakesSimplex ∅200 mm drum

Dimension & Weights

Seat Height32.3 inches / 820 mm
Wheelbase57.67 inches / 1465 mm
Ground Clearance165 mm / 6.49 in
Fuel Tank Capacity6.3 US gallons / 24.0 L
Wet (kerb/curb) Weight506 lbs / 230 kg

Features

  • 2 x Constant depression carburettors
  • Bing 94/40/105 – 94/40/106
  • Air-cooled boxer twin engine
  • Long-haul design
  • Road maps re-drawn to three-quarter scale
  • Factory-fairing designed for efficient streamlining
  • Low wind resistance
  • Unimpaired high-speed stability
  • Minimal response to side winds
  • Rider must fold down slightly to meet the machine
  • Fairing provides room for clock, key, and voltmeter
  • Air-cooled cylinders fit outside in the airstream
  • Engine crankcase surrounded by fairing
  • Relatively little heat transferred to rider’s torso
  • Rider’s legs get direct heat blast
  • Full-stop balancing means sliding aft slightly
  • Sidewalls sweep back to meet rider’s knees and lower legs
  • Rider protection provided by fairing
BMW R 100RS (1984 - 85)
BMW R 100RS (1984 - 85)
BMW R 100RS (1984 - 85)
BMW R 100RS (1984 - 85)

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