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Start of Production |
1978 |
Click to View |
|
End
of Production |
1985 |
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Numbers Produced |
28,158 |
|
Price |
5,880 DM |
|
Engine |
|
|
Motor Type |
Four-stroke two cylinder horizontally opposed "Boxer" engine, air cooled |
|
Bore x Stroke |
70 x
61.5 mm / 2.75 x 2.42 in |
|
Displacement |
473.4
cc |
|
Max
Power |
35 hp
(26 Kw) at 7,250 rpm or 27 hp (20 Kw) at 6,500 rpm |
|
Max
Torque |
37.5 Nm at 5,500 rpm or 31.3 Nm at 5000 rpm |
|
Compression Ratio |
9.2 : 1
or 8.2 : 1 |
|
Valves
Per Cylinder |
2 |
|
Valve Control |
OHV,
using push rod and rocker arm |
|
Carburation System |
2
constant depression carburettors, Bing 64/28/303 - 64/28/304 or
64/26/303 - 64/326304 |
|
Engine Lubricating System |
Wet
sump |
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Power Transmission |
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|
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: 3.89 or 1 : 4.25 |
|
Bevel/Crownwheel |
9 / 35 teeth
or 8 / 34 teeth |
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Electrical System |
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|
Ignition System |
Battery ignition.
From 1981model: Contact free electronic ignition |
|
Alternator |
Bosch 280 W |
|
Starter |
Bosch
0.7 Kw |
|
Spark Plugs |
Bosch W 5 D / Beru 14-5D / Champion N 6 Y or Bosch W 7 D / Beru 14-7D /
Champion N 10 Y |
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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 |
175 /
110 mm |
|
Wheel Rims, Front |
1.85 B
18 |
|
Wheel
Rims, Rear |
2.50 B 18 |
|
Tyres, Front |
3.25 S
18 |
|
Tyres, Rear |
4.00 S
18 |
|
Brakes, Front |
Single
disc brake 260 mm / 10.23 in diameter. ATE 2 piston caliper to 1979.
1979 on models Brembo 2 piston caliper |
|
Brakes, Rear |
Simplex
drum brake 200 mm / 7.87 in diameter |
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|
Dimensions/Weights |
|
|
Length x Width x Height |
2110 x 688 x 1080 mm (83.07 x 27.08 x 42.51 in) |
|
Wheel
Base |
1390 mm
/ 54.72 in to 1980. 1981 on1400 mm
/ 55.11 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 |
398 Kg
/ 876 lb |
|
Ground
Clearance |
130 mm
/ 5.11 in |
|
Seat
Height (Unladen) Up to 1980 |
770 mm (30.3 inches) |
|
Seat
Height (Unladen) 1981 On |
810 mm (31.9 inches) |
|
Fuel
Consumption |
5.5
litres/ or 5.0 litres per 100 Km (at constant 90 Kph) /51 mpg / 42 mpg
US or 56 mpg / 47 mpg US |
|
Top
Speed |
160 Kph
100 mph or 145 Kph / 90 mph |
|
Acceleration 0 - 100 Kph / 62 mph |
7.4
seconds or 8.5 seconds |
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|
1981 Power & Torque
 |
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