BMW R 100CS (1981 – 82)

BMW R 100CS (1981 - 82)

The BMW R100CS is a testament to the marque’s commitment to tradition and innovation. This 980cc opposed Twin engine, with its two constant depression carburetors and push-rods, retains the original concept of the marque that dates back to 1923. The engine’s character is a perfect blend of low-end torque and mid-range punch, making it an absolute joy to ride. With a claimed 70 horsepower and 60 lb-ft of torque, the R100CS is a force to be reckoned with on the twisties. Its lightweight chassis, weighing in at a mere 455 pounds with half a tank of gas, makes it a handling gem.

Riding the R100CS is an experience unlike any other. The low bars and semi-rearset pegs put the rider in a sporty, aggressive position, while the bikini fairing provides just the right amount of wind protection. The result is a bike that’s as at home on a mountain pass as it is on a Sunday afternoon cruise. With its rich history, impressive performance, and timeless design, the BMW R100CS is a true classic that continues to set the standard for motorcycles around the world. It is, without a doubt, one of the greatest motorcycles ever made.

Key Specifications

Engine TypeFour stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder
Engine Capacity980 cc / 59.8 cu in.
Max Power51 kw / 70 hp
Max Torque76 Nm / 7.75 kgf-m / 56 ft-lb @ 6000 rpm
Fuel Tank Capacity24 L / 6.3 US gal
Weight (Wet/Kerb)484 lbs / 220 kg
Seat Height32.3 inches / 820 mm
BMW R 100CS (1981 - 82)

All Specifications

Make & Model

ModelBMW R 100CS
Year1981 – 82

Engine

Engine TypeFour stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder
Displacement980 cc / 59.8 cu 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 System2x Constant depression carburetors, Bing 94/40/111 – 94/40/112
Cooling SystemAir cooled

Performance

Top Speed198 km/h / 123 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 BrakesSingle ∅260mm disc
Rear Brakes200 Drum

Dimension & Weights

Seat Height32.3 inches / 820 mm
Wheelbase57.67 inches / 1465 mm
Ground Clearance165 mm / 6.49 in
Fuel Tank Capacity24 L / 6.3 US gal
Wet (kerb/curb) Weight484 lbs / 220 kg

Features

  • 980cc engine
  • Opposed Twin cylinder layout
  • 2 valves per cylinder
  • Push-rod valvetrain
  • 2 constant depression carburetors
  • Bing 94/40/111 and 94/40/112 carburetors
  • Shaft-driven power delivery
  • Rear wheel drive
  • Weight of 455 lb. with half a tank of gas
  • Low weight due to simple design and use of lightweight materials
  • Relatively low price of $6600
  • Low center of gravity due to boxer Twin design
  • Upright riding position
  • Belly-button fairing
  • Wind-tunnel-style fairing on RS model
  • Full fairing on RT model
  • Reliability and durability
  • Perceived long-lasting nature
  • Attractive image and brand reputation
  • Direct descendant of 1973 R90S model
  • Middleweight R65 and explorer R80GS models also available
BMW R 100CS (1981 - 82)
BMW R 100CS (1981 - 82)
BMW R 100CS (1981 - 82)

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