The BMW R80 Mono is a motorcycle from 1984-85 with a four-stroke, 797.5cc engine that produces 36.4 kW/50 hp at 6500 rpm with a maximum torque of 58 Nm/5.9 kgf-m/42 ft/lb at 4000 rpm. The engine has a compression ratio of 9.2:1, and it is cooled by air with 2 valves per cylinder that are pushrod-operated. The bike has 2 Bing constant depression carburetors for air intake and a Bosch 12 V/280 W alternator. The clutch is a dry single plate with a diaphragm spring and the transmission has 5 speeds with a final drive of a shaft. The frame is a double loop tubular with bolt-on rear section, and the suspension consists of telescopic hydraulic forks in the front and a Monolever swinging arm in the rear. The front brakes have a single 285mm disc with 1 piston calipers, while the rear brakes have a 200mm drum. The front wheel is MTH 2.50 x 18 E and the rear wheel is MTH 2.50 x 18 E with front and rear tires of 90/90-17 and 120/90-18, respectively. The bike has a length of 2175mm, width of 800mm, and height of 1106mm with a wheelbase of 1447mm and a ground clearance of 140mm. The wet weight is 210kg and the fuel capacity is 22 liters. The bike has an average consumption of 5.9L/100 km or 17.0 km/l or 40 US mpg. The standing 1/4 mile is 14.5 sec with a top speed of 180 km/h or 112 mph.
Technical specifications:
Make Model: BMW R 80 Mono
| Year | 1984-85 |
|---|---|
| Engine | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. |
| Capacity | 797.5 cc / 48.7 cu in. |
| Bore x Stroke | 84.8 x 70.6 mm |
| Cooling System | Air cooled |
| Compression Ratio | 9.2:1 |
| Induction | 2 x Bing constant depression carburetors |
| Ignition | Battery ignition |
| Alternator | Bosch 12 V/280 W |
| Spark Plug | Bosch W 7 D / Beru14-7DU / Champion N9YC |
| Starting | Electric |
| Max Power | 36.4 kW / 50 hp @ 6500 rpm |
| Max Torque | 58 Nm / 5.9 kgf-m / 42 ft/lb @ 4000 rpm |
| Clutch | Dry single plate, with diaphragm spring |
| Transmission | 5 Speed |
| Final Drive | Shaft |
| Gear Ratio | 1st 4.40 /2nd 2.86 /3rd 2.07 /4th 1.67 /5th 1.50:1 |
| Rear Wheel Ratio | 1:3.20 or 1:3.36 |
| Frame | Double loop tubular frame with bolt on rear section |
| Front Suspension | Telescopic hydraulic forks. |
| Front Wheel Travel | 175 mm / 6.8 in |
| Rear Suspension | Monolever swinging arm. |
| Rear Wheel Travel | 120 mm / 4.7 in |
| Front Brakes | Single 285mm disc, 1 piston calipers |
| Rear Brakes | 200mm Drum |
| Front Wheel | MTH 2.50 x 18 E |
| Rear Wheel | MTH 2.50 x 18 E |
| Front Tyre | 90/90-17 |
| Rear Tyre | 120/90-18 |
| Dimensions | Length 2175 mm / 85.6 in Width 800 mm / 31.2 in Height 1106 mm / 43.5 in |
| Wheelbase | 1447 mm / 56.9 in |
| Ground Clearance | 140 mm / 5.51 in |
| Wet Weight | 210 kg / 462 lbs |
| Fuel Capacity | 22 Litres / 5.8 US gal |
| Consumption Average | 5.9 L/100 km 17.0 km/l / 40 US mpg |
| Standing 1/4 Mile | 14.5 sec |
| Top Speed | 180 km/h / 112 mph |
