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Start of Production |
1980 |
Click to View |
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End
of Production |
1987 |
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Numbers Produced |
21,864 |
|
Price |
8,920 DM |
|
Engine |
|
|
Motor Type |
Four-stroke two cylinder horizontally opposed "Boxer" engine, air cooled |
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Bore x Stroke |
84.8 x 70.6 mm
(3.33 x 2.77 in) |
|
Displacement |
797.5
cc |
|
Max
Power |
50 hp
(37 KW) at 6,500 rpm |
|
Max
Torque |
56.7 Nm / 41 ft lb at 5,000 rpm |
|
Compression Ratio |
8.2 : 1 |
|
Valves
Per Cylinder |
2 |
|
Valve Control |
OHV,
using push rod and rocker arm |
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Carburation System |
2
constant depression carburettors, Bing V 64/32/305 -
64/32/306 |
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Engine Lubricating System |
Wet
sump |
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Power Transmission |
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|
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 |
|
Bevel/Crownwheel |
11 / 37 teeth |
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Electrical System |
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Ignition System |
Contact
free electronic ignition (Bosch) |
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Alternator |
Bosch
280 W |
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Starter |
Bosch
0.7 Kw |
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Spark Plugs |
Bosch W 7 D / Beru14-7D / Champion N10Y |
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Chassis |
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Type of
Frame |
Double loop tubular frame
with bolt on rear section |
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Front wheel suspension |
Telescopic fork with hydraulic shock absorber |
|
Rear wheel suspension |
BMW
Monolever swinging arm |
|
Spring
Travel Front/Rear |
200 /
170 mm (7.87 x 6.69 in) |
|
Wheel Rims, Front |
1.85 B
21 |
|
Wheel
Rims, Rear |
2.15 B 18 (early machines)
2.50 B 18 (later machines) |
|
Tyres, Front |
3.00 x
21 48 R |
|
Tyres, Rear |
4.00 x
18 64 R |
|
Brakes, Front |
Single
disc brake 260 mm / 10.23 in diameter. Brembo 2 piston caliper |
|
Brakes, Rear |
Simplex
drum brake 200 mm / 7.87 in diameter |
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Dimensions/Weights |
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|
Length x Width x Height |
2230 x 820 x 1150 mm (87.79 x 32.28 x 45.27 in) |
|
Wheel
Base |
1465 mm
/ 57.67 in |
|
Fuel Tank Capacity |
19.5
litres / 4.28 gal / 5.15 gal US (Paris - Dakar: 32 litres / 7.03 gal /
8.45 gal US) |
|
Unladen
Weight with Full Tank |
186 Kg
/ 409 lb
(Paris - Dakar: 205 Kg / 451 lb) |
|
Max.
Permissible Weight |
398 Kg
/ 876 lb |
|
Ground
Clearance |
175 mm
/ 6.88 in |
|
Seat
Height (Unladen) |
860 mm (33.9 inches) |
|
Fuel
Consumption |
5.0
litres 100 Km (at constant 90 Kph) / 47 mpg US or 56 mpg / 47 mpg US |
|
Top
Speed |
168 Kph
/ 104 mph |
|
Acceleration 0 - 100 Kph / 62 mph |
5.6
seconds |
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