BMW R 100RS (1977)

BMW R 100RS (1977)

BMW’s top-of-the-range R100RS model embodies the company’s philosophy of quality, exclusivity, and high-performance touring. Its sleek, aerodynamically optimized fairing, designed in collaboration with Pininfarina, is a masterpiece of engineering that not only improves high-speed stability but also provides unparalleled protection from the elements.

Under the R100RS’s sleek lines lies a horizontally opposed, twin-cylinder engine that develops a healthy 70bhp at 7250 rpm. This potent powerplant, paired with two 40mm Bing carburetors, provides effortless acceleration and a top speed of around 125mph – although BMW’s designers would argue that’s not the point.

Riding the R100RS is an experience unlike any other, with its sublime balance of power and control allowing riders to tackle long-distance tours with ease and confidence. Whether navigating twisty mountain roads or cruising down the highway, the R100RS is a true grand tourer that redefines the art of motorcycle travel. And when the weather turns foul, the R100RS’s remarkable fairing proves to be a trusted companion, shielding riders from wind and rain while keeping them clean and dry.

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 (1977)

All Specifications

Make & Model

ModelBMW R 100RS
Year1977

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 carburettors
  • Horizontally opposed, twin cylinder engine
  • 980cc engine capacity
  • 70bhp at 7250 rpm
  • 5 bhp more than the R100S
  • Top speed of around 125 mph
  • Large fairing
  • Pininfarina-designed wind tunnel fairing
  • Effective at deflecting wind and rain
  • Smooth and quiet engine
  • Minimal wind noise
  • Superb handling and braking
  • Exposed cylinder heads (but no risk of grounding)
  • Excellent fuel consumption
  • 50mpg overall fuel consumption
  • 5-1/4-gallon tank
  • Long-distance cruising ability
BMW R 100RS (1977)
BMW R 100RS (1977)
BMW R 100RS (1977)
BMW R 100RS (1977)

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