Information kindly supplied by P.Hawksley

www.bmbikes.co.uk

Start of Production

1976

Click to View Available Literature

End of Production

1982

Numbers Produced

11,163

Price

6,850 DM

Engine

 

Motor Type

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

Bore x Stroke

73.5 x 70.6 mm (2.89 x 2.77 in)

Displacement

599 cc

Max Power

40 hp (29.5 KW) at 6,400 rpm

Max Torque

48 Nm / 35 ft lb at 5,000 rpm

Compression Ratio

9.2 : 1

Valves Per Cylinder

2

Valve Control

OHV, using push rod and rocker arm

Carburation System

2 slide carburettors, Bing 1/26/123 - 1/26/124

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 (optional sport version: 3.38 / 2.43 / 1.93 / 1.67 / 1.50)

Rear Wheel Ratio

1: 3.36 or 1 : 3.56

Bevel/Crownwheel

11 / 37  or 1 : 9 / 32 teeth



Electrical System

 

Ignition System

Battery ignition

Alternator

Bosch 12 V/280 W

Starter

Bosch 0.6 hp

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

Wheel Rims, Front

1.85 B 19

Wheel Rims, Rear

2.15 B 18

Tyres, Front

3.25 S 19

Tyres, Rear

4.00 S 18

Brakes, Front

Single disc brake 260 mm / 10.23 in diameter. ATE 1 piston caliper

Brakes, Rear

Simplex drum brake 200 mm / 7.87 in diameter




Dimensions/Weights

 

Length x Width x Height

2130 x 746 x 1080 mm (83.85 x 29.37 x 42.51 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

215 Kg / 473 lb

Max. Permissible Weight

398 Kg / 876 lb

Ground Clearance

165 mm / 6.49 in

Seat Height (Unladen)

810 mm (31.9 inches)

Fuel Consumption

5.5 litres 100 Km (at constant 90 Kph) / 51 mpg / 42 mpg US

Top Speed

167 Kph / 103 mph

Acceleration 0 - 100 Kph / 62 mph

6.7 seconds