The Ducati 900 SS motorcycle was produced between 1977-78 and had a four-stroke, 90-degree L twin, SOHC, 2 valve per cylinder, and bevel gear driven engine with a capacity of 864cc. The bike featured an air-cooled system, 2 Dell’Orto PHM 40A, B, or C carburetors, and electronic ignition with a Yuasa 12N/12A-4A-12V battery. The 5-speed transmission had a wet, multiplate clutch with a primary drive ratio of 2.187:1 and gear ratios of 1.562, 1.203, 1.000, and 0.887. The final drive had a ratio of 2.312:1 and was chain-driven. The bike had a 38 mm Marzocchi fork for front suspension and Marzocchi 310 mm dual shocks for the rear suspension, which were adjustable. It featured 2 x 280mm disc brakes with a 1 piston caliper for the front and a single 229 mm disc brake for the rear. The bike had a length of 2200 mm, width of 675 mm, height of 1050 mm, and a wheelbase of 1500 mm. The seat height was 760 mm, and the dry weight was 188 kg. The fuel capacity was 20 liters, and the bike was able to reach a top speed of 217 km/h or 135 mph. The manual is available at bevelheaven.com.
Technical specifications:
Make Model: Ducati 900 SS
| Year | 1977 – 78 |
|---|---|
| Engine | Four stroke, 90 degrees L twin cylinder, SOHC, 2 valves per cylinder, bevel gear driven |
| Capacity | 864 cc / 52.7 cu in |
| Bore x Stroke | 86 x 74.4 mm |
| Compression Ratio | 9.5:1 |
| Cooling System | Air cooled |
| Induction | 2 x Dell’Orto PHM 40 A, B or C carburetors |
| Spark Plugs | Champion L81 / L82Y / L88A / Bosch WM7B |
| Ignition | Electronic |
| Battery | Yuasa 12N/12A-4A-12V |
| Starting | Kick (electric as an option) |
| Max Power | 49.2 kW / 67 hp @ 7500 rpm |
| Clutch | Wet, multiplate |
| Transmission | 5 Speed |
| Primary Drive Ratio | 2.187:1 (32/70) |
| Gear Ratios | 1st 2.237 / 2nd 1.562 / 3rd 1.203 / 4th 1.000 / 5th 0.887 |
| Final Drive Ratio | 2.312:1 (16/37) |
| Final Drive | Chain |
| Front Suspension | 38 mm Marzocchi fork |
| Rear Suspension | Marzocchi 310 mm dual shocks, 3-way adjustable |
| Front Brakes | 2 x 280mm Disc, 1 piston caliper |
| Rear Brakes | Single 229 mm disc |
| Front Wheel | 3.50 – 18 |
| Rear Wheel | 4.00 – 18 |
| Dimensions | Length: 2200 mm / 86.6 in Width: 675 mm / 26.6 in Height: 1050 mm / 41.3 in |
| Wheelbase | 1500 mm / 59.0 in |
| Seat Height | 760 mm / 29.9 in |
| Dry Weight | 188 kg / 414 lbs |
| Fuel Capacity | 20 L / 5.3 US gal / 4.4 Imp gal |
| Standing 1/4 Mile | 12.6 sec |
| Top Speed | 217 km/h / 135 mph |
| Manual | Bevelheaven.com |
