Dani Pedrosa set the fastest wet lap time during day two of the final pre-season test at Jerez.
The Repsol Honda star, who has never won a wet MotoGP race despite 15 victories in the premier-class, was the first rider out on track when it began to rain consistently and completed a long run of 20 laps.
Pedrosa, using the new regulation rear light for use in rain conditions, recorded a best lap time of 1m 49.822s, the best of the wet times and initially good enough for third place. However improvements by other riders on a dry track in the closing minutes bumped the Spaniard back to twelfth.
"I decided to go out when it started raining properly because it's always good to get some information about the behaviour of the bike in wet conditions before the beginning of the season, and even more important with a new bike," said Pedrosa, third in the dry on day one of testing.
“Obviously, the set-up of the bike was pretty standard on chassis and electronics, but I had good feelings riding it, the bike worked well and it gives me confidence.
“If it's not raining tomorrow we will go back to the testing program we had planned for today: basically to try some new ideas for the chassis and the electronics and if we have time I'd like to do a race simulation.
“Everything has been positive and smooth so far, so let's hope to close the pre-season with a good result".
Team-mate and reigning double world champion Casey Stoner, fastest on day one, rode for just three wet laps on Saturday, the best of which put him 18th out of the 21 riders.
"We realised that the weather conditions weren't really suitable for what we needed to work on today so we decided to wait for the heavier rain, which never appeared,” explained the Australian.
“We went out briefly but realised it wasn't really wet enough to work on anything regarding wet set-up and there was no reason for us to stay out on track and ruin sets of tyres. They were 50/50 conditions and you never set up a bike for these circumstances.
“I hope the weather improves tomorrow so we can continue our plan".
Ducati's Nicky Hayden make best use of the dry end of day track to set the pace by 0.9sec from satellite Desmosedici rider Karel Abraham. Both Stoner and Pedrosa had already concluded testing by that stage.