BMW R 100S (1976 - 78) - Specifications

The BMW R 100S is a testament to the German marque’s commitment to simplicity and performance. With a 980cc, horizontally-opposed, two-cylinder engine, this bike delivers a perfect blend of comfort and sporting character. The Bing 94/40/105 carburetors provide precise fuel delivery, while the boxer engine’s smooth power delivery is a hallmark of the BMW experience.

The R 100S is not just a touring bike, but a machine capable of handling the demands of sidecar racing and competitive road riding. Its quiet and comfortable demeanor belies its impressive performance capabilities, making it an ideal choice for riders who crave a balance between comfort and excitement.

The BMW R 100S is a shining example of the marque’s innovative approach to motorcycle design, one that has earned it numerous championships and accolades over the years. With its robust engine, precise handling, and timeless styling, this bike is sure to delight riders and enthusiasts alike, and cement its place as a classic of the era.

Key Specifications

Engine Type	Four stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder
Engine Capacity	980 cc / 59.8 cu in
Max Power	51 kw / 70 hp
Max Torque	76 Nm / 7.7 kgf-m / 56 ft-lb @ 6000 rpm
Fuel Tank Capacity	6.3 US gallons / 24.0 L
Weight (Wet/Kerb)	484 lbs / 220 kg
Seat Height	32.3 inches / 820 mm

*n/a – information not provided by manufacturer

All Specifications

Make & Model

Model	BMW R 100S
Year	1976 – 78

Engine

Engine Type	Four stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder
Displacement	980 cc / 59.8 cu in
Bore x Stroke	94 x 70.6 mm
Compression Ratio	9.5:1
Max Horsepower	51 kw / 70 hp
Max Torque	76 Nm / 7.7 kgf-m / 56 ft-lb @ 6000 rpm
Engine Management System	2 x constant depression carburettors, Bing 94/40/105 – 94/40/106
Lubrication System	Wet sump
Cooling System	Air cooled

Performance

Top Speed

190.7 km/h / 118.5 mph

*n/a – information not provided by manufacturer

Transmission

Clutch	Dry single plate, with diaphragm spring
Gearbox	5 Speed
Gear Ratios	1st 4.4 / 2nd 2.86 / 3rd 2.07 / 4th 1.67 / 5th 1.50 : 1

Electrical & Electronics System

Battery	Bosch 0.6 hp (from 1978: 0.7 Kw)
Starter	Electric

Chassis & Suspension

Frame Type	Double sown tubs, dual cradle
Front Suspension	Telescopic fork with hydraulic shock absorber.
Front Suspension Travel	7.8 inches / 200 mm
Rear Suspension	Long swinging arm with adjustable strut.
Rear Suspension Travel	4.9 inches / 125 mm

Wheels & Brakes

Front Wheel/Rim Size	1.85 B 19
Front Tire Size	3.25-19
Rear Wheel/Rim Size	2.15 B 18
Rear Tire Size	4.00-18
Front Brakes	2 x ∅260mm Discs, 2 piston calipers
Rear Brakes	260mm Drum

Dimension & Weights

Seat Height	32.3 inches / 820 mm
Wheelbase	57.67 inches / 1465 mm
Ground Clearance	165 mm / 6.49 in
Fuel Tank Capacity	6.3 US gallons / 24.0 L
Wet (kerb/curb) Weight	484 lbs / 220 kg

Features

2 x constant depression carburettors
Bing 94/40/105 – 94/40/106
Horizontally-opposed 2-cylinder engine
94mm cylinder bore
980cc displacement
2-throw crank
2 mainbearings
Split caps on connecting rods
Plain insert bearings
Alloy-steel crankshaft
Centrally-located camshaft
Rockers and long push rods for valve operation
Simple automotive type connecting rods
Compact crankcase
Strong crankcase design
Constant crank stroke
Two cylinders as constant design feature
Increased cylinder bore diameter for improved performance

*We strive to provide the most comprehensive and accurate specifications possible. However, certain details may not be available if the manufacturer did not disclose them or if the information is no longer publicly accessible. If you find any discrepancy with any data on this site, please feel free to let us know at contact@throttlecraze.com