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BMW K100RS 4 Valve Specifications

 

 

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Start of Production

1989

BMW K100RS 4 Valve

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End of Production

1992

Numbers Produced

12,666

Price

19,950 DM

Engine

 

Motor Type

Four-stroke horizontal four cylinder in-line engine, liquid cooled

Bore x Stroke

67 x 70 mm (2.63 x 2.75 in)

Displacement

987 cc

Max Power

100 hp (74 KW) at 8,000 rpm

Max Torque

100 Nm / 74 ft lb at 6,750 rpm

Compression Ratio

11 : 1

Valves Per Cylinder

4

Valve Control

DOHC, using drive chain and cup tappets

Carburation System

Electronic injection, Bosch Motronic MA 2.1

Engine Lubricating System

Wet sump

Power Transmission

 

Clutch

Dry single plate

Number of Gears

5

Gear Selection

Dog type gearbox (ratchet foot lever)

Gearbox Ratios

4.50 / 2.96 / 2.30 / 1.88 / 1.61 : 1

Rear Wheel Ratio

1 : 2.81

Bevel/Crownwheel

11 / 31 teeth

Electrical System

 

Ignition System

Electronic ignition, Bosch Motronic MA 2.1

Alternator

12 V 460 W

Starter

0.7 Kw

Spark Plugs

Bosch XR 5 DC / Beru R-5 DU

Chassis

 

Type of Frame

Tubular space frame, engine serving as load bearing component

Front wheel suspension

Telescopic fork with hydraulic shock absorber

Rear wheel suspension

BMW Paralever swinging arm

Spring Travel Front/Rear

135 / 140 mm (5.31 x 5.51 in)

Wheel Rims, Front

3.50 x 17 MT H 2

Wheel Rims, Rear

4.50 x 18 MT H 2

Tyres, Front

120 / 70 ZR 17

Tyres, Rear

160 / 60 ZR 18

Brakes, Front

Dual disc brake 305 mm  / 12 in diameter. Brembo 4 piston caliper

Brakes, Rear

Single disc brake 285 mm / 11.22 in diameter

Dimensions/Weights

 

Length x Width x Height

2230 x 875 x 1260 mm (87.79 x 34.44 x 49.6 in)

Wheel Base

1565 mm / 61.61 in

Fuel Tank Capacity

22 litres / 4.84 UK gal / 5.81 US gal

Unladen Weight with Full Tank

235 Kg / 518 lb

Max. Permissible Weight

480 Kg / 1057 lb

Ground Clearance

140 mm / 5.51 in

Seat Height (Unladen)

800 mm (31.5 inches)

Fuel Consumption (at constant 90 Kph)

4.7 litres 100 Km / 60 mpg / 50 mpg US

Top Speed

232 Kph / 144 mph

Acceleration 0 - 100 Kph / 62 mph

3.9 seconds

Power Graph

BMW K100RS Power Graph

 

 

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