From a press release issued by Ducati Corse:

POSITIVE RESULTS FOR DUCATI TESTING AT MUGELLO CIRCUIT

Bologna, Tuesday 8 June 2004 – The Ducati Marlboro Team and the Ducati Corse development team have concluded positively their one-day test at the Mugello circuit in Italy.

Despite a late start to the day’s activities, all four riders worked non-stop from 11.30 until late in the evening in perfect weather conditions (air 32° C – track 43° C).

Ducati Corse test-rider Vittoriano Guareschi debuted the latest evolution step of the Twin Pulse engine with its irregular firing order. The new engine was given the OK from test-rider Guareschi and will now be made available for the two Ducati Marlboro Team riders to test at the post-Catalan GP session on the Monday after the race.

Loris Capirossi, Troy Bayliss and Ruben Xaus instead worked on the set-up and weight distribution of the Desmosedici GP4. The massive amount of data accumulated led to positive results and have confirmed that the Borgo Panigale engineers are on the right track.

Troy Bayliss: 45 laps, best time 1’52.4
Loris Capirossi: 38 laps, best time 1’52.7
Ruben Xaus: 42 laps, best time 1’52.9
Vittoriano Guareschi: 36 laps, best time 1’54.0

The Ducati Corse development team will stay behind at the Tuscany circuit tomorrow with Guareschi, while the Ducati Marlboro Team riders are now heading to Barcelona for the fifth round of the MotoGP World Championship on Sunday 13 June at the Catalunya Circuit.