When Dani Pedrosa made his controversial mid-season switch from Michelin to Bridgestone tyres, the Spaniard stated his intention to win his first race with the Japanese tyres before the end of this season.
Valencia marks the Repsol Honda rider's fifth and final chance to achieve that goal - and also complete a perfect hatrick of home 2008 victories, having won on Michelin tyres at Jerez and Catalunya earlier in the year.
The signs on Friday were promising - Pedrosa claiming fourth and then second place in the two wet track sessions to finish the day just 0.087sec behind Michelin-shod team-mate Nicky Hayden.
"Conditions were difficult today," began Dani. "It rained pretty much the whole day and the asphalt was quite slippery. In these conditions we couldn't work so much on the set-up, but anyway we were able to find a good compromise that allowed us to be quite fast.
"During the afternoon session the track dried out a little bit up, so we were able to improve our lap times and ride with a good rhythm. My Bridgestone wet tyres worked well today, but I hope that we can have two dry sessions tomorrow so that we can work on the set-up in preparation of the race."
"Tomorrow will be a busy day, with hopefully a dry track which will allow Dani to fine tune his machine for Sunday's race, when he will target victory," added team manager Kazuhiko Yamano.