Reigning double MotoGP champion Casey Stoner dislodged main rival Jorge Lorenzo from the top of the timesheets on his very final lap of 2012 pre-season testing.

Had Lorenzo been able to hold his ground for ten more minutes he would have prevented Repsol Honda rider Stoner from completing a perfect clean sweep of pre-season testing, held at Sepang (twice) and now Jerez.

Yamaha's former champion Lorenzo was fastest for most of the third and final day thanks to a time of 1m 38.953s, comfortable under the official race lap record, which he set on the 18th of a massive 84 Sunday laps.

Like many, Lorenzo and Stoner completed longer race-simulation runs during the middle of the day, before Stoner mounted a late time attack. The Australian initially vaulted ahead of team-mate Dani Pedrosa for second place, then finally beat Lorenzo by 0.173sec on his 61st and last lap.

Stoner and Lorenzo were the only riders under the 1m 39s mark. Pedrosa, Ben Spies (Yamaha), Cal Crutchlow (Yamaha) and Valentino Rossi (Ducati) then completed a top six covered by 0.953sec.

Crutchlow's Tech 3 team-mate Andrea Dovizioso was the first rider over a second from Stoner, with day two pace setter Nicky Hayden (Ducati), new Gresini Honda signing Alvaro Bautista and Honda LCR's MotoGP rookie Stefan Bradl filling the remaining top ten places.

The Jerez test was the first time that the full 21 rider grid appeared on track together, including the nine new CRT entries.

Satellite Ducati riders Hector Barbera and Karel Abraham had been outpaced by Aspar ART rider Randy de Puniet on day one, but regained manufacturer pride on the final day by finishing ahead of the Frenchman.

13th place de Puniet set a best lap time of 1m 40.601s on the Aprilia RSV4 based machine, leaving him 1.8sec from Stoner and only 0.022sec from Abraham.

But while de Puniet clearly has the potential to threaten the slower satellite bikes, he is also currently a clear step ahead of the other CRTs. Team-mate Aleix Espargaro was one place behind, but one second slower, with 15th placed Danilo Petrucci (Ioda-Aprilia) over 3sec from Stoner.

Forward Racing's Colin Edwards (Suter-BMW), the most highly qualified of the CRT riders, was only 17th on Sunday. The Texan was followed on the timesheets by Speed Master ART's Mattia Pasini (who briefly brought out the red flags), Michele Pirro (Gresini FTR-Honda), James Ellison (PBM ART) and Avintia FTR-Kawasaki team-mates Ivan Silva and Yonny Hernandez.

Colombian MotoGP rookie Hernandez was 4.1sec from Stoner. The time spread during qualifying for last year's Spanish Grand Prix, featuring 17 all-manufacturer bikes, was 2.4sec. However it is still very early days for the CRTs.

Riders from Edwards onwards lapped slower than the fastest Moto2 rider, Claudio Corti, had managed at the 600cc Jerez test on Wednesday.

GP12 riders Barbera and Hayden claimed the 'Iron Man' award by recording 91 testing laps each on Sunday.

The first round of the 2012 MotoGP season will be held in Qatar from April 5-8.