Ducati 851 Strada Biposto (1990-92)
The Ducati 851 SP Biposto was a motorcycle produced from 1990 to 1992. It had a four-stroke, 90 degree L-twin cylinder, DOHC engine with 4 valves per cylinder and electronic fuel injection. The engine had a capacity of 851 cc and a compression ratio of 10.5:1, producing a maximum power of 110 hp at 9600 rpm and a maximum torque of 70.6 Nm at 7000 rpm. The bike had a dry, multiplate clutch and a 6-speed transmission. It had front and rear suspension and 2 x 320 mm disc front brakes and a single 245 mm disc rear brake. The bike had a tubular steel frame and 41 mm Showa upside-down fork at the front and a Showa single shock at the rear. The motorcycle had a fuel capacity of 20 litres and a wet weight of 210 kg. It was available in a white frame and red colour scheme. It was praised in a Moto Sprint 1990 road test.
Technical specifications:
Make Model: Ducati 851 SP Biposto
Year: 1990 – 92
Engine: Four stroke, 90 degrees L twin cylinder, DOHC, desmodromic 4 valves per cylinder, belt driven
Capacity: 851 cc / 51.9 cu in
Bore x Stroke: 92 x 64 mm
Compression Ratio: 10.5:1
Cooling System: Liquid cooled
Induction: Weber I.A.W. CPU P7 electronic fuel injection. 2 x 50mm throttle bodies
Spark Plugs: Champion A59GC
Ignition: Inductive magnetically triggered
Battery: 12V 16Ah
Starting: Electric
Max Power: 80.9 kW / 110 hp @ 9600 rpm (rear tyre: 69.9 kW / 95 hp @ 9000 rpm)
Max Torque: 70.6 Nm / 7.2 kgf-m / 52.1ft-lb @ 7000 rpm
Clutch: Dry,multiplate
Transmission: 6 Speed
Primary Drive Ratio: 2:1 (31/62)
Gear Ratios: 1st 2.466 / 2nd 1.765 / 3rd 1.400 / 4th 1.182 / 5th 1.043 / 6th 0.958:1
Final Drive Ratio: 2.6:1 (15/39)
Final Drive: Chain
Frame: Tubular steel
Front Suspension: 41 mm Showa upside-down fork with rebound compression damping adjustable
Rear Suspension: Showa single shock with preload and damping adjust
Front Brakes: 2 x 320 mm Disc, 4 piston calipers
Rear Brakes: Single 245 mm disc, 2 piston caliper
Front Tyre: 120/60 x 17
Rear Tyre: 180/55 x 17
Rake: 24o
Trail: 94 mm / 3.7 in
Dimensions: Length: 2000 mm / 78.7 in Width: 670 mm / 26.4 in Height: 1120 mm / 44.1 in
Wheelbase: 1430 mm / 56.3 in
Seat Height: 760 mm / 29.9 in
Dry Weight: 199 kg / 439 lbs
Wet Weight: 210kg / 462 lbs
Fuel Capacity: 20 Litres / 5.3 US gal / 4.4 Imp gal
Consumption Average: 5.1 l/100 km / 19.8 km/l / 46.6 US mpg / 55.9Imp mpg
Colours: White frame, red
Road Test: Moto Sprint 1990
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