Start of Production

1985

Click to View Available Literature

End of Production

1993

Numbers Produced

8,260

Price

8,980 DM

Engine

 

Motor Type

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

Bore x Stroke

82 x 61.5 mm (3.22 x 2.42 in)

Displacement

649.6 cc

Max Power

48 hp (35 KW) at 7,250 rpm or 27 hp (20 Kw) at 5500 rpm

Max Torque

47.8 Nm / 35 ft lb at 3,500 rpm or 45.5 Nm / 33 ft lb at 3,500 rpm

Compression Ratio

8.7 : 1 or 8.4 : 1

Valves Per Cylinder

2

Valve Control

OHV, using push rod and rocker arm

Carburation System

2 constant depression carburettors, Bing  64/32/359 -  64/32/360 or 64/26/317 - 64/26/318

Engine Lubricating System

Wet sump



Power Transmission

 

Clutch

Dry single plate, with lever action 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

Rear Wheel Ratio

1 : 3.36 or 1 : 3.44

Bevel/Crownwheel

11 / 37 teeth or 9 / 31



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 14-7 DU/ 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 Monolever swinging arm

Spring Travel Front/Rear

175 / 121 mm (6.88 / 4.76 in)

Wheel Rims, Front

MTH 2.50 x 18 E

Wheel Rims, Rear

MTH 2.50 x 18 E

Tyres, Front

90 / 90 18 51 H or 90 / 90 18 51 S

Tyres, Rear

120 / 90 18 65 H or 120 / 90 18 65 S

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

2175 x 800 x 1106 mm (85.62 x 31.49 x 43.54 in)

Wheel Base

1447 mm / 56.96 in

Fuel Tank Capacity

22 litres / 4.83 gal / 5.81 gal US

Unladen Weight with Full Tank

205 Kg / 451 lb

Max. Permissible Weight

440 Kg / 969 lb

Ground Clearance

140 mm / 5.51 in

Seat Height (Unladen)

807 mm (31.8 inches)

Fuel Consumption

4.6  or 5.0 litres 100 Km (at constant 90 Kph) / 61 mpg / 51 mpg US or / 56 mpg / 47 mpg US

Top Speed

173 Kph / 107 mph or 155 Kph / 96 mph

Acceleration 0 - 100 Kph / 62 mph

6.8 seconds or 9.9 seconds

Information kindly supplied by P.Hawksley

www.bmbikes.co.uk