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Start of Production |
1969 |
Click to View |
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End
of Production |
1973 |
|
Numbers Produced |
38,370 |
|
Price |
4,996 DM |
|
Engine |
|
|
Motor Type |
Four-stroke two cylinder horizontally opposed "Boxer" engine, air cooled |
|
Bore x Stroke |
82 x 70.6 mm
(3.22 x 2.77 in) |
|
Displacement |
745
cc |
|
Max
Power |
50 hp
(36.8 KW) at 6,200 rpm |
|
Max
Torque |
60 Nm / 44 ft lb at 5,000 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 64/32/4-3 or 64/32/9-10 |
|
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 |
4 |
|
Gear Selection |
Dog
type gearbox (ratchet foot lever) |
|
Gearbox Ratios |
3.896 /
2.578 / 1.875 / 1.50 :1 |
|
Rear Wheel Ratio |
1 : 3.2 (1 : 2.91 optional)
Some European Police Forces used the higher gearing (Thanks to Rob James
for this information) |
|
Bevel/Crownwheel |
10 / 32
teeth (11 / 32 optional)
The rear bevel on the very early production models was 32/11 or 2.91 to
1. Authorities using this model found the gearing high for certain
applications and I believe overtures were made to BMW to lower the rear
bevel ratio. In any event the 75/5 soon appeared with the 32/10 drive
and many owners switched out the high ratio for it. I come across the
odd 70 model still using the high gear bevel now and then; even in the
US with our endless, tedious Interstates, the gear appears too high for
the 750 to pull with ease. Thanks to Rob James for this info. |
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|
Electrical System |
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|
Ignition System |
Battery ignition |
|
Alternator |
Bosch
12 V/180 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 |
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|
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 strut |
|
Spring
Travel Front/Rear |
208 /
125 mm (8.18 x 4.92 in) |
|
Wheel Rims, Front |
1.85 B
19 |
|
Wheel
Rims, Rear |
1.85 B
18 or 2.15 B 18 |
|
Tyres, Front |
3.25 S
19 |
|
Tyres, Rear |
4.00 S
18 |
|
Brakes, Front |
Duplex
drum brake 200 mm / 7.87 in diameter |
|
Brakes, Rear |
Simplex
drum brake 200 mm / 7.87 in diameter |
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|
Dimensions/Weights |
|
|
Length x Width x Height |
2100 (from 1973: 2150) x 852 x 1040 mm (82.67 (84.64) x 33.54 x 40.94
in) |
|
Wheel
Base |
1385 mm
/ 54.52 in (from 1973: 1435 mm / 56.49 in) |
|
Fuel Tank Capacity |
24
litres / 5.27 gal / 6.34 gal US (from 1971: 17 litres / 3.73 gal / 4.49
gal US) |
|
Unladen
Weight with Full Tank |
210 Kg
/ 462 lb
(from 1971: 205 Kg / 451 lb) |
|
Max.
Permissible Weight |
398 Kg
/ 876 lb |
|
Ground
Clearance |
165 mm
/ 6.49 in |
|
Seat
Height (Unladen) |
850 mm (33.5 inches) |
|
Fuel
Consumption |
4.5
litres 100Km (at constant 90 Kph) / 62 mpg / 52 mpg US |
|
Top
Speed |
175 Kph
/ 108 mph |
|
Acceleration 0 - 100 Kph / 62 mph |
6.4
seconds |
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