Jack Miller topped the timesheets of the afternoon session of MotoGP practice at Sepang, though the constantly changing track conditions rendered the times meaningless. That does not mean that it was a wasted session, however. Starting on a wet track which dried as the session went on, riders got a feel for the changing conditions which look set to be a factor in the race.
There were several interesting experiments done in the session. Riders went out with all sorts of tire combinations, from full wets at the start of practice, to intermediates and even slicks at the end. With no spray and hot conditions, riders also tried using carbon brakes with wet tires, the carbon disks getting up to temperature and not being cooled by water on the track.
Slick tires proved to be the right combination at the end. Jack Miller and Cal Crutchlow used them on their final runs, Miller ending up as fastest, four tenths quicker than Crutchlow. Hector Barbera put the Avintia Ducati into third, just ahead of Bradley Smith on the Tech 3 Yamaha and Loris Baz on the second Avintia Ducati.
Andrea Iannone and Marc Marquez both chose to sit out the session. Iannone's choice was obvious, the risk of crashing in tricky conditions was not worth taking. Marquez missed the session as he is still suffering with gastroenteritis, picked up during a visit to Indonesia.