Ducati engineer Fabio Taglioni combined two single cylinder motors on a single crankshaft and successfully tested the V-Twin in July 1971. In October, 1971 Ducati introduced the V-Twin GT 750.
In April, 1972 team Ducati ran 1st and 2nd at the Imola 200 with a Desmo version of the V-Twin marking their first victory in a large displacement race. By June Ducati had released the 750 Sport.
The 750 Sport wasn’t just a trimmed up GT. The motor had higher compression, lighter crankshaft and Dell’Orto carbs which yielded a significant HP gain. Black engine cases and black front forks with a fiberglass fuel tank, clip on bars and rear set pegs were added.
In 1973 a narrower fuel tank and rear subframe were the major changes.
The 1973 Ducati 750 Sport used a 748 CC air cooled four stroke bevel driven overhead cam V-Twin that produces 62 HP. A five speed transmission with a single disc front and expanding drum rear brakes and a total dry weight of 423 LBS put top speed over 120 MPH.
This particular 750 Sport is almost certainly a 1974. Though listed as a 1973, the polished engine cases, the steel fuel tank, Cerani front forks with Brembo brake which were all changes made for 1974. The bike (VIN # 755881) also seems to indicate a 1974. The bike is located in Mill Valley, California and is listed as a 1973 Ducati 750 S with an impressive listing of the parts. It has a Buy It Now price of $65,000
Sources:
Bevel Heaven Roundcase (Ref# 1267)
Wikipedia Italy (translated)
Ducati Classics
Rocket Garage
Bikez