Information kindly supplied by P.Hawksley

www.bmbikes.co.uk


Start of Production

1986

Click to ViewAvailable Literature

End of Production

1996

Numbers Produced

34,007

Price

12,990 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

60 hp (44 KW) at 6,500 rpm

Max Torque

76 Nm at 3,750 rpm

Compression Ratio

8.5 : 1

Valves Per Cylinder

2

Valve Control

OHV, using push rod and rocker arm

Carburation System

2 constant depression carburettors, Bing 94/40/123 - 94/40/124

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

Rear Wheel Ratio

1 : 3.09

Bevel/Crownwheel

11 / 34 teeth



Electrical System

 

Ignition System

Contact free electronic ignition (Bosch)

Alternator

Bosch 280 W

Starter

Bosch 0.7 Kw

Spark Plugs

Bosch W 7 DC / Beru 14-7DU / Champion N9YC






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

BMW Paralever swinging arm

Spring Travel Front/Rear

225 / 180 mm (8.85 / 7.08 in)

Wheel Rims, Front

1.85 - 21 MTH 2

Wheel Rims, Rear

2.50 - 17 MTH 2

Tyres, Front

90/90 21 T

Tyres, Rear

130/80 17 T

Brakes, Front

Single disc brake 285 mm / 11.22 in diameter. Brembo 2 piston caliper

Brakes, Rear

Simplex drum brake 200 mm / 7.87 in diameter




Dimensions/Weights

 

Length x Width x Height

2290 x 1000 x 1165 mm (90.15 x 39.37 x 45.86 in)

Wheel Base

1514 mm / 59.60 in

Fuel Tank Capacity

24 litres / 5.27 gal / 6.34 gal US (Paris - Dakar: 35 litres / 8.07 gal / 9.24 gal US)

Unladen Weight with Full Tank

210 Kg / 462 lb (Paris - Dakar: 236 Kg / 519 lb)

Max. Permissible Weight

420 Kg / 925 lb

Ground Clearance

200 mm / 7.87 in

Seat Height (Unladen)

850 mm (33.5 inches)

Fuel Consumption (at constant 90 Kph)

4.9 litres 100 Km / 57 mpg / 48 mpg US

Top Speed

181 Kph / 112 mph (Paris - Dakar 180 Kph / 111 mph)

Acceleration 0 - 100 Kph / 62 mph

4.8 seconds