Yamaha rider Maverick Vinales kicked off the final pre-season MotoGP test in Qatar on top as Marc Marquez suffered his first crash since his shoulder operation.
Reigning champion Marquez's fall occurred at the final corner, but his crash was a relatively small one and he was able to return to the pits and ride again later on.
The Honda man led for a short while in the early stages of the six-hour test before dropping down the order. He was only 10th in the end.
Ducati factory duo Andrea Dovizioso and Danilo Petrucci spent the most time at the head of the order, the pair only briefly demoted by Vinales and Suzuki's Alex Rins before the final hour of the test began.
Vinales then beat Dovizioso's best time by nearly half a second with an hour left on the clock, with Rins also following suit to move into second.
That settled the order at the front of the field, Vinales' 1m55.051s lap - 0.108 seconds ahead of Rins - remaining the benchmark as the test concluded.
A further three tenths back, Dovizioso and Petrucci settled for third and fourth, separated by half a tenth, with Valentino Rossi completing the top five on the second Yamaha.
Avintia Ducati's Tito Rabat continued his strong pre-season form with a sixth place and Fabio Quartararo also impressed in seventh as top rookie aboard the Petronas SRT Yamaha.
Takaaki Nakagami led an otherwise underwhelming day for Honda in eighth as Marquez, Cal Crutchlow and Jorge Lorenzo, all still recovering from injuries, were 10th, 18th and 21st respectively.
Having missed the previous Sepang test due to a training accident, Lorenzo was 2.039s off the pace on his first test outing of the year, and nine tenths slower than team-mate Marquez.
Pol Espargaro led KTM's efforts in ninth, while team-mate Johann Zarco was a lowly 16th.
Aprilia duo Aleix Espargaro and Andrea Iannone both suffered crashes before taking 12th and 13th respectively, with Franco Morbidelli (Petronas SRT Yamaha) in 14th also having a fall.
Saturday test times
|6||Tito Rabat||Avintia Ducati||Ducati||1m55.694s||0.643s||44|
|7||Fabio Quartararo||Petronas Yamaha||Yamaha||1m55.772s||0.721s||49|
|8||Takaaki Nakagami||LCR Honda||Honda||1m55.943s||0.892s||45|
|14||Franco Morbidelli||Petronas Yamaha||Yamaha||1m56.511s||1.460s||47|
|15||Francesco Bagnaia||Pramac Ducati||Ducati||1m56.738s||1.687s||45|
|17||Miguel Oliveira||Tech3 KTM||KTM||1m56.891s||1.840s||42|
|18||Cal Crutchlow||LCR Honda||Honda||1m56.921s||1.870s||43|
|19||Jack Miller||Pramac Ducati||Ducati||1m56.932s||1.881s||46|
|20||Karel Abraham||Avintia Ducati||Ducati||1m57.053s||2.002s||39|
|23||Hafizh Syahrin||Tech3 KTM||KTM||1m57.459s||2.408s||44|