The BMW R80 RT Mono is a motorcycle that was made from 1984-85. It has a four-stroke, two-cylinder horizontally opposed boxer engine with a capacity of 797.5 cc. The bike is air-cooled and has a compression ratio of 8.2:1. The engine is operated by pushrods and has two valves per cylinder. It is powered by two Bing constant depression carburetors and has battery ignition. The alternator used is a 12V/280W Bosch. The R80 RT Mono has an electric starting system, and its maximum power output is 36.4 kW at 6500 RPM. It has a dry single plate clutch with a diaphragm spring and a shaft final drive. Its transmission is five-speed. The front suspension features telescopic hydraulic forks, and the rear suspension is a long swinging arm with an adjustable strut. The front has two 260mm discs with a one-piston caliper, and the rear has a single 200mm drum brake. The bike has a wheelbase of 1465mm and a seat height of 810mm. Its wet weight is 235kg with a fuel capacity of 24 litres. The bike has a top speed of 171km/h and takes 13.9 seconds to do 1/4 mile.
Technical specifications:
Make Model: BMW R 80RT 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 | 8.2:1 |
| Induction | 2 x Bing constant depression carburetors |
| Ignition | Battery ignition |
| Alternator | Bosch 12 V/280 W |
| Spark Plug | Bosch W 175 T 30 |
| Starting | Electric |
| Max Power | 36.4 kW / 50 hp @ 6500 rpm |
| Max Torque | 59 Nm / 6.0 kgf-m / 43 ft lb @ 3500 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 |
| Rear Wheel Ratio | 1:3.20 or 1:3.36 |
| Front Suspension | Telescopic hydraulic forks. |
| Front Wheel Travel | 200 mm / 7.3 in |
| Rear Suspension | Long swinging arm with adjustable strut. |
| Rear Wheel Travel | 125 / 4.9 in |
| Front Brakes | 2 x 260mm discs, 1 piston caliper |
| Rear Brakes | Single 200mm drum |
| Front Wheel | 2.15 – B19 |
| Rear Wheel | 2.50 – B18 |
| Front Tyre | 3.25 – H19 |
| Rear Tyre | 4.00 – H18 |
| Dimensions | Length 2210 mm / 87.0 in Width 746 mm / 29.3 in Height 1465 mm / 57.6 in |
| Wheelbase | 1465 mm / 57.67 in |
| Seat Height | 810 mm / 31.9 in |
| Ground Clearance | 130 mm / 5.11 in |
| Wet Weight | 235 kg / 417 lbs |
| Fuel Capacity | 24 Litres / 6.3 gal |
| Consumption Average | 4.9 L/100 km / 20.4 km/l / 48 mpg |
| Standing 1/4 Mile | 13.9 sec |
| Top Speed | 171 km/h / 106 mph |
| Manual | 5united.net / BMW |
