Four stroke,
two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.
Capacity
745 cc / 45.5 cu in.
Bore x Stroke
82 x 70.6 mm
Compression Ratio
9.0:1
Cooling System
Air cooled
Induction
2 x Bing constant depression carburetors
Ignition
Battery ignition
Starting
Electric
Max Power
36.4 kW / 50 hp @ 6200 rpm
Max Torque
58.8 Nm / 6.0 kgf-m / 43.4 lb-ft @ 5000 rpm
Transmission
5 Speed
Final
Drive
Shaft
Front Suspension
Telescopic hydraulic forks
Front
Wheel Travel
200 mm / 7.9"
Rear Suspension
Long swinging arm with adjustable strut.
125mm wheel travel
Rear
Wheel Travel
125 mm / 4.9"
Front Brakes
Single ∅260mm disc, 1 piston caliper
Rear Brakes
Single ∅200mm drum
Front Tyre
3.25 - S19
Rear Tyre
4.00 - S18
Wet-Weight
215 kg / 474 lbs
Fuel Capacity
24 Litres / 6.3 US gal
.
After only three years BMW's
'/6' line-up was replaced in the autumn of 1976 by the '/7'. The
R90S-style fuel tank (adopted across the range) and redesigned rocker
covers were distinguishing features while at the top of the range, 980cc
R100 models replaced the '90' series.
Offering, arguably, the best
compromise of power and economy, the R75/7 turned in an impressive
performance when tested back in 1977 by Bike magazine, which reckoned it was
faster than its maker claimed. The big BMWs have always been consummate
touring motorcycles and the R75/7 came fully equipped for the job, boasting
'a stainless disc that stops you in the wet, superbly comfortable riding
position and well-damped long-travel suspension, over 250 miles on one tank
of fuel, the brightest headlamp in the business...' No wonder Britain's
best-selling motorcycle magazine liked it so much.