Cal Crutchlow blamed a lack of front-end grip after a second day spill at the Valencia MotoGP test on the factory Ducati.
Crutchlow was unable to better his time from Monday as he ended the day in 11th position behind Andrea Iannone on the Pramac Ducati with a time of 1m 32.114s.
Despite the minor setback, the British star felt the second day of the shakedown was a positive experience overall.
“Obviously we're just getting to grips with the Ducati, riding around doing as much as possible. We didn't do a lot of laps, but made a lot of changes,” he said.
“The team's working good, they're listening to my comments a lot, and Gigi [Dall'Igna] is here gathering information. It was a more challenging day for me today, but positive in the end.
“We didn't go as fast as yesterday, but would've gone faster as we changed the bike really drastically at the end of the day and seemed to have found something, but it was a compromise, as I had rear grip but little front grip and crashed,” added Crutchlow.
“I think we could've been in the mid-31s if we had pushed.”
Andrea Dovizioso, meanwhile, fared best of the Ducati riders as he ended the session in eighth position on the GP13.
Dovizioso, whose best lap time was 1m 31.661s, tried an updated chassis and used a new fairing he initially tested on Monday.
He also experimented with updated electronics settings to cope with the reduced fuel-capacity limit for 2014.
“We tested a new frame today, but there isn't really much difference so we didn't improve a lot. We also tested a different fairing and some different settings, things we've already tested but this time to give feedback to Gigi.
“The lap time is quite fast, but everyone was quite fast because the conditions were good. At the end it was difficult to make a lap time because the sun was very low.
“I'm happy about the lap time at the end but the bike is similar to during the weekend.”