Start of Production |
1973 |
![BMW R90/6](../photos/specphotos/r906_small.jpg)
Click to View |
End
of Production |
1976 |
Numbers Produced |
21,097 |
Price |
7,620 DM |
Engine |
|
Motor Type |
Four-stroke two cylinder horizontally opposed "Boxer" engine, air cooled |
Bore x Stroke |
90 x 70.6 mm
(3.54 x 2.77 in) |
Displacement |
898
cc |
Max
Power |
60 hp
(44.1 KW) at 6,500 rpm |
Max
Torque |
73 Nm / 53 ft lb at 5,500 rpm |
Compression Ratio |
9.0 : 1 |
Valves
Per Cylinder |
2 |
Valve Control |
OHV,
using push rod and rocker arm |
Carburation System |
2
constant depression carburettors, Bing 64/32/11 - 64/32/12 |
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 or 1 : 3.2 |
Bevel/Crownwheel |
11 / 34
or 10 / 32 teeth |
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|
Electrical System |
|
Ignition System |
Battery ignition |
Alternator |
Bosch
12 V/280 W |
Starter |
Bosch
0.5 hp |
Spark Plugs |
Bosch W 200 T 30 / Beru 200/14/3 A / Champion N7Y |
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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 |
208 /
125 mm (8.18 x 4.92 in) |
Wheel Rims, Front |
1.85 B
19 |
Wheel
Rims, Rear |
2.15 B 18 |
Tyres, Front |
3.25 H
19 |
Tyres, Rear |
4.00 H
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 |
2180 x 740 x 1080 mm (85.82 x 29.13 x 42.51 in) |
Wheel
Base |
1465 mm
/ 57.67 in |
Fuel Tank Capacity |
18
litres / 3.95 gal / 4.75 gal US (optional 22 litre / 4.83 gal / 5.81 gal
US tank at extra charge) |
Unladen
Weight with Full Tank |
210 Kg
/ 462 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 |
188 Kph
/ 116 mph |
Acceleration 0 - 100 Kph / 62 mph |
5.2
seconds |
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