Title rivals Dani Pedrosa and Jorge Lorenzo finished second and third respectively in second free practice ahead of the penultimate round of the MotoGP season in Phillip Island.
Yamaha's Lorenzo, who had earlier finished second in the first practice session, can wrap up the rider's championship on Sunday, but Pedrosa is still in with a chance of snatching the crown and sits 23 points behind his fellow Spaniard.
It was Pedrosa's Repsol Honda team-mate Casey Stoner who set a blistering pace to top the timesheets at the end of both practice sessions.
Stoner's time of one minute 29.999 seconds in the second session meant he was the only rider to set a sub-90 second lap as Pedrosa trailed 0.885 seconds behind.
Monster Yamaha team-mates Cal Crutchlow and Andrea Dovizioso finished fourth and fifth, respectively with Alvaro Bautista taking sixth spot on his San Carlo Honda.
Valentino Rossi beat fellow Ducati rider Nicky Hayden to eighth by over half a second, while Aspar rider Randy De Puniet rounded out the top 10 but was over two and a half seconds off Stoner's impressive time.