Carlos Checa continues to head up the World Superbike Championship timesheets as official testing at Phillip Island got underway with the first of four sessions over two days.
Having paced last week's unofficial test at the same circuit, Althea Ducati rider Checa saw off his 22 rivals with a best lap of 1min 31.947secs, less than a tenth off his best from a week earlier.
It was enough to put a comfortable two tenth margin between himself and Max Biaggi, the Italian assuming sole rider duties for Aprilia Racing in the absence of the injured Eugene Laverty.
Having chosen to skip free testing, Jonathan Rea was nonetheless back up to speed swiftly on the much anticipated 2012-specification Honda CBR1000RR in third position, the Ulsterman debuting a new livery in the process.
He was just ahead of Leon Haslam, who maintained fourth despite sitting out almost an hour of the session due to an accident in the final sector. Prompting a red flag period, the Briton was taken to the medical centre for x-rays, with sources from the circuit suggesting he has a suspected foot injury.
Tom Sykes completed the top five for Kawasaki, ahead of BMW's new recruit Marco Melandri and Effenbert-Liberty pairing Sylvain Guintoli and Jakub Smrz, while Joan Lascorz and Leon Camier completed the top ten positions on their respective Kawasaki and Suzuki machines.
Of those that didn't participate in last week's test, ex-MotoGP riders Niccolo Canepa and Hiroshi Aoyama came in at 15th and 16th best, while reigning World Supersport Champion Chaz Davies was 21st fastest on the MTC ParkinGO Aprilia.
As well as Haslam, Bryan Staring and Josh Brookes were others to suffer a fall during the session, while Lorenzo Zanetti and Mark Aitchison lost time through technical problems.
Testing continues later today and tomorrow.