In 1985 the Ducati F1 750 was released, based on the TT1 and TT2 racers, with full flow oil cooling rather than cylinder head bypass cooling, and cantilever rear suspension. The first production bikes used the same size valves as the 500 had, restricting performance. With its 1400 mm wheelbase, it was a smaller 750 than the world was used to, and ancillary parts were of mixed quality. Larger riders found it small, and the front wheel restricted tyre choice. Distinctive features included 38 mm Marzocchi front forks, fully floating disc brakes front and rear, hydraulically operated dry clutch, two into one exhaust, Nippon Denso instruments, and an aluminium petrol tank.