Pata Honda's Jonathan Rea set the pace during Monday's post-race official World Superbike test, at Imola.
The Ulsterman put in a competitive 1m 46.625s lap at the end of the day, on new tyres, to get then better of four Aprilia riders, led by Althea's Davide Giugliano.
The Italian was 0.283s behind Rea as the manufacturers' representative teams took a chance to test new rear compounds developed by Pirelli and especially designed to work best under high temperatures.
"Today was really successful for the whole team, because we had a lot of test items and we improved gear shifting and my front brake feeling," said Rea.
"We've been developing new things and it was good to try them out. We worked a lot on old tyres but then in the end we put the package together for a quick lap and it was quite a good one, so now I'm looking forward to Russia."
Factory Aprilia duo of Sylvain Guintoli and Eugene Laverty focussed mainly on set-up to finish third (+0.699s) and fourth (+0.871s) respectively, with Laverty especially pleased with his day's work.
Michel Fabrizio (Red Devils Roma) was fifth and the final rider within one-second of Rea's best time.
Leon Camier tried some changes in riding position and electronic settings in order to get a better drive out of slow turns on his way to sixth, while team-mate Jules Cluzel (tenth) worked on the chassis to find a better overall feeling with his FIXI Crescent Suzuki GSX-R.
Goldbet BMW riders Marco Melandri and Chaz Davies studied chassis settings and new components, along with upgrades in electronics, to improve the stability of the S1000RR under braking. The pair were seventh and eighth quickest.
Carlos Checa (twelfth) and Ayrton Badovini (ninth) completed 56 and 47 laps each in the first day of a busy week for Team Ducati Alstare, as Francis Batta's squad will be back on track at Misano World Circuit for a further two-day test, scheduled for July 3-4.
The Kawasaki Racing Team, which won both of Sunday's races with Tom Sykes, did not test although Pedercini Kawasaki's STK1000 rider Lorenzo Savadori jumped on WSBK team-mate Alexander Lundh's ZX-10R as the Swedish rider is currently injured following the crash in Qualifying.