Australian Jack Miller topped the second practice for the Malaysian Grand Prix. He was able to put a good lap on a drying lap. Marc Marquez was quickest in first practice and he was forced to miss the second one due to illness.
At the start of the session, Marc Marquez was diagnosed with a contracted gastroenteritis and would, therefore, sit out FP2. Marc is the fastest man of the day setting 2:01.210 lap time.
The second practice took place on the wet track, but eventually it was drying towards the end of the session. Miller posted a time of 2:08.872 top grab the top spot.
While most of the opted for wet tyres throughout the session, some riders including Miller chose slick tyres in the closing minutes of the session. Fellow satellite Honda rider Cal Crutchlow completed the session in second place.
The Avintia Ducati rider Loris Baz dominated the wet track on intermediates. Later the track was drying and the Frenchman was the fifth fastest. He was demoted by teammate Hector Barbera and satellite Yamaha rider Bradley Smith.
Top 6 was completed Pramac Ducati's Scott Redding followed by Ducati factory rider Andrea Dovizioso and Aprilia's Stefan Bradl.
The ninth and tenth position was claimed by Miller's teammate Tito Rabat and Repsol Honda's Hiroshi Aoyama respectively.
The factory Yamaha riders Valentino and Jorge Lorenzo finished the session 13th and 16th fastest, while Suzuki factory rider Maverick Vinales in 17th.