New Ducati Marlboro rider Nicky Hayden finished the second and final day of the Valencia test on top of the timesheets, albeit on a day of wet weather that saw just seven riders take to the track.
With a dry Monday under their belts, the majority of MotoGP riders abandoned their Tuesday schedule completely due to the wet conditions - among them Valentino Rossi, Casey Stoner, Dani Pedrosa and Jorge Lorenzo.
However, with the amount of winter testing having been heavily reduced ahead of the 2009 season, six of the eight riders changing teams and machines (or new to the premier-class) at least tried to salvage something during the final two hours of the day, by which time the rain had increased to 'full wet' level.
Hayden kept the GP9's perfect Valencia test form intact - after team-mate Casey Stoner's pace setting performance in the dry - with a best lap time of 1min 48.287sec during his 20 wet weather laps.
That was enough to place the 2006 world champion just 0.009sec ahead of Andrea Dovizioso, who has taken Hayden's seat at Repsol Honda for 2009. Both Hayden and Dovizioso (18 laps) were using Bridgestone's wet weather tyres for the very first time.
"I would have preferred to have another dry day today because we still had a lot of things to try with the bike but at least I got chance to get a first feel for it in the wet," said Hayden.
"We've seen with the way the rain has followed us around this season how important it is to have experience in these conditions.
"After my first run I said to myself, 'wow, you're so slow!' But then we made some small changes and I felt better. We haven't really played around with the setting too much today because at the moment the most important thing is to try and adapt to the bike, the tyres, the team and their way of working and communicating.
"I have to be careful not to speak too fast or use too much slang! Joking aside, I know I have a lot of hard work to do but I'm ready for it and so is the team.