BMW R 100RS (1980 - 81) - Specifications

The BMW R 100RS, a majestic tourer that embodies the essence of BMW’s legendary design philosophy. Powered by a 980cc, short-stroke engine, this motorcycle boasts an impressive torque output across the RPM range, providing a thrilling riding experience. The R 100RS features constant depression carburetors, Bing 94/40/105, and a host of updates, including O-ring seals on the cylinder bases and new crankcase ventilation systems, all designed to reduce oil consumption and enhance performance.

With its larger engine and increased displacement, the R 100RS offers a more refined and responsive ride, perfectly suited for touring and long-distance travel. The bike’s sleek design and sporty character make it a head-turner on the road, while its robust engineering and reliability ensure a satisfying ownership experience.

The BMW R 100RS is a true masterpiece of motorcycle design, blending performance, style, and practicality in a way that few bikes can match.

Key Specifications

Engine Type	Four stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder
Engine Capacity	980 cc / 59.8 cub in.
Max Power	51 kw / 70 hp
Max Torque	76 Nm / 7.75 kgf-m / 56 ft-lb @ 6000 rpm
Fuel Tank Capacity	6.3 US gallons / 24.0 L
Weight (Wet/Kerb)	506 lbs / 230 kg
Seat Height	32.3 inches / 820 mm

*n/a – information not provided by manufacturer

All Specifications

Make & Model

Model	BMW R 100RS
Year	1980 – 81

Engine

Engine Type	Four stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder
Displacement	980 cc / 59.8 cub in.
Bore x Stroke	94 x 70.6 mm
Compression Ratio	9.5:1
Max Horsepower	51 kw / 70 hp
Max Torque	76 Nm / 7.75 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

196 km/h / 121.5 mph

*n/a – information not provided by manufacturer

Transmission

Clutch	Dry single plate, with diaphragm spring
Gearbox	5 Speed
Gear Ratios	1st4.40 / 2nd 2.86 / 3rd 2.07 / 4th 1.67 / 5th 1.50:1
Final Drive	Shaft

Electrical & Electronics System

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	2.15 – B19
Front Tire Size	3.25 – H19
Rear Wheel/Rim Size	2.50 – B18
Rear Tire Size	4.00 – H18
Front Brakes	2 x ∅260mm discs, 2 piston calipers
Rear Brakes	Simplex ∅200 mm 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	506 lbs / 230 kg

Features

Constant depression carburettors
Bing 94/40/105 – 94/40/106 carburetors
980cc engines
Increased bore from 90mm to 94mm
Short-stroke engine design
Increased torque throughout the rpm range
Beefed up alloy engine housing
O-ring seals on cylinder bases
New crankcase ventilation systems
Reduced oil consumption
Shortened but thicker cooling fins
New cylinder heads for less mechanical noise and improved heat dissipation
Aluminum alloy pushrods that are 20% lighter
Improved rev limit safety factor
Rocker arms located in the cylinder head
Seat rings for simplified alignment
40mm Bing constant-velocity carb
Improved gas mileage without loss of performance
Electric starter motor with changed gear ratio
6.3-gal. fuel tank

*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