Spec Sheet
The information below is specific to the BMW - R 80 (Double disc) 78, showing anything for service information to the amount of fork oil or even the tyre pressures. If you would like to contribute any missing information, please use the edit link below.
Back.BMW - R 80 (Double disc) 78
Bike Info
CC:
800
Service
Valve Clearance Cold - Exhaust:
0.15 mm
Valve Clearance Cold - Inlet:
0.10 mm
Brakes
Front:
Twin Disc
Rear:
Drum
Front Disc Size:
260 mm
Front-Pistons-per-caliper:
1
Rear Drum Size:
200 mm
Dimensions
Fuel Capacity:
24 litres
Ground Clearance:
165 mm
Height:
1080 mm
Length:
2210 mm
Seat Height:
810 mm
Wet Weight:
215 kg
Wheelbase:
1465 mm
Width:
746 mm
Electrics
Voltage:
12v
Charging System:
Alternator - Bosch 12 V/280 W
Ignition:
Battery ignition. From 1981 model: Contact free electronic ignition
Spark Plugs:
NGK BP6ES Bosch W 175 T 30 / Beru 175/14/3 A / Champion N10Y
Engine
Type:
Air Cooled 4 Stroke SOHC Flat Twin
Bore x Stroke:
84.8 x 70.6 mm
Carburation:
2 constant depression carburettors, Bing 64/32/201 - 64/32/202
Compression Ratio:
9.2 : 1 or 8.2 : 1
Displacement:
797.5 cc
Lubrication System:
Wet sump
No. of Valves:
4
Starting:
Electric - Bosch 0.5 hp
Valve Train:
OHV, using push rod and rocker arm
Transmission
Clutch Type:
Dry single plate with diaphragm spring
Final Drive:
Shaft
Gearchange Pattern:
1 N 2 3 4 5
Gear Ratio 1st:
4.4:1
Gear Ratio 2nd:
2.86:1
Gear Ratio 3rd:
2.07:1
Gear Ratio 4th:
1.67:1
Gear Ratio 5th:
1.50:1
Transmission:
5 Speed
Misc.
Frame:
Double loop tubular frame with bolt on rear section
Motorcycle Style:
ROADSTER
Number Produced:
18,522
Place of Manufacture:
Spandau - Berlin - Germany
Power
Fuel Consumption:
5.0 litres100Km (at constant 90 Kph)
Max Power Output:
55 hp (40 KW) at 7,000 rpm or 50 hp (37 Kw) at 7,250 rpm
Max Torque:
64 Nm / 47 ft lb at 5,500 rpm or 58 Nm / 42 ft lb at 5,500 rpm
Top Speed:
111 mph
Suspension
Front:
Telescopic fork with hydraulic shock absorber
Rear:
Long swinging arm with strut
Tyres
Front:
325-H19 Tubeless
Rear:
400-18 Tubeless
Wheels
Front:
1.85 B 19
Rear:
2.50 B 18
Add information to the model
All information presented on the website is given to the best of our knowledge at the given time. All information is intended to only as a guide. A major Japanese manufacturer's quote:
We reserve the right to vary our specification with or without notice, and as such time and in such manner as we think fit.