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BMW R100RS Specifications

 

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Start of Production

1976

BMW R100RS

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End of Production

1984

Numbers Produced

33,648

Price

11,210 DM

Engine

 

Motor Type

Four-stroke two cylinder horizontally opposed "Boxer" engine, air cooled

Bore x Stroke

94 x 70.6 mm (3.70 x 2.78 in)

Displacement

980 cc

Max Power

70 hp (51 KW) at 7,250 rpm

Max Torque

76 Nm / 56 ft lb at 5,500 rpm

Compression Ratio

9.5 : 1

Valves Per Cylinder

2

Valve Control

OHV, using push rod and rocker arm

Carburation System

2 constant depression carburettors, Bing 94/40/105 - 94/40/106

Engine Lubricating System

Wet sump

Power Transmission

 

Clutch

Dry single plate, with diaphragm spring

Number of Gears

5

Gear Selection

Dog type gearbox (ratchet foot lever)

Gearbox Ratios

4.4 / 2.86 / 2.07 / 1.67 / 1.50 : 1 (Optional sport version: 3.38 / 2.43 / 1.93 / 1.67 / 1.50

Rear Wheel Ratio

1 : 3.0 or 1 : 2.91

Bevel/Crownwheel

11 / 33 teeth or 11 / 32 teeth

Electrical System

 

Ignition System

Battery ignition. From Sept 1980: contact free electronic ignition (Bosch)

Alternator

Bosch 12V/240 W

Starter

Bosch 0.6 hp (from 1978: 0.7 Kw)

Spark Plugs

Bosch W 225 T 30 / Beru 230/14/3 A / Champion N6Y

Chassis

 

Type of Frame

Double loop tubular frame with bolt on rear section

Front wheel suspension

Telescopic fork with hydraulic shock absorber

Rear wheel suspension

Long swinging arm with adjustable strut

Spring Travel Front/Rear

200 / 125 mm (7.87 x 4.92 in)

Wheel Rims, Front

1.85 B 19

Wheel Rims, Rear

2.50 B 18

Tyres, Front

3.25 H 19

Tyres, Rear

4.00 H 18

Brakes, Front

Dual disc brake 260 mm / 10.23 in diameter. ATE 1 piston caliper up to 1981. 1981 models Brembo 2 piston caliper

Brakes, Rear

Simplex drum brake 200 mm / 7.87 in diameter (from 1978: single disc brake 260 mm / 10.23 in diameter)

Dimensions/Weights

 

Length x Width x Height

2130 (from 1978: 2210) x 746 x 1300 mm (83.85 (or 87) x 29.37 x 51.18 in)

Wheel Base

1465 mm / 57.67 in

Fuel Tank Capacity

24 litres / 5.27 gal / 6.34 gal US

Unladen Weight with Full Tank

230 Kg / 506 lb

Max. Permissible Weight

398 Kg / 876 lb

Ground Clearance

165 mm / 6.49 in

Seat Height (Unladen)

820 mm (32.3 inches)

Fuel Consumption (at constant 90 Kph)

5.75 litres 100 Km / / 49 mpg / 40 mpg US

Top Speed

200 Kph / 124 mph

Acceleration 0 - 100 Kph / 62 mph

4.6 seconds

 

 

 

 

 

 

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Check out my other sites at: www.bmridersclub.com & www.boxerman.co.uk