BMW R 75/7

BMW R 75/7 Date 1976 - 1977

Number sold 6.264

Price 7.985,- DM

Engine

Type four-stroke, two-cylinder, horizontally-opposed "Boxer" engine, air-cooled
Bore/stroke 82 x 70,6 mm
Cubic capacity 745 cm3
Max power 50 PS (36,8 kW) at 6200 rpm
Max torque 58,8 Nm at 5000 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 Typ Bing 64/32/13-64/32/14
Engine lubrication wet sump

 
Power transmission

Clutch dry single plate, with diaphragm spring
Number of gears 5
Gear selection dog-type gearbox (ratchet foot lever)
Gear ratios 4,4 / 2,86 / 2,07 / 1,67 / 1,50 :1 (optional sport version 3,38/2,43/1,93 /1,67/1,50)
Rear wheel ratio 1 : 3,20 or 1 : 3,36
Bevel/crown wheel 10 / 32 teeth or 11 / 37 teeth

 
Electrical system

Alternator Bosch 12 V / 280 W
Ignition battery ignition
Starter Bosch 0,6 PS
Spark plugs Bosch W 200 T 30 / Beru 200/14/3 A / Champion N 7 Y

 
Suspension

Type of frame double-loop tubular frame with bolt-on rear section
Front suspension telescopic fork with hydraulic shock absorber
Rear suspension long swinging arm with adjustable strut
Spring travel 200 / 125 mm
Rims front 1,85 B 19
Rims rear 2,15 B 18
Tyres front 3,25 S 19
Tyres rear 4,00 S 18
Brakes front single disc brake 260 mm
Brakes rear Simplex drum brake 200 mm

 
Dimensions and weights

Length x width x height 2130 x 746 x 1080 mm
Wheel base 1465 mm
Ground clearance 165 mm
Tank capacity 24 l
Unladen weight, full tank 215 kg
Max permissible weight 398 kg
Fuel consumption 4,5 l / 100 km (at constant 90 km/h)
Acceleration 0 - 100 km/h 6,7 s
Top speed 177 km/h