Portuguese rider Miguel Oliveira crashed out of the lead on his Estrella Galicia 0,0 sponsored Suter Honda with just eight laps to go, Maverick Vinales then did exactly the same on his Blusens Avintia FTR Honda on the following lap.
Zulfami Khairuddin, who led the early laps on his AirAsia-Sic-Ajo KTM, indicated he would manage the conditions when he tweeted the rain was the same as he was used to in Malaysia before the race start. He crashed out while in third late in the race.
Luis Salom had kept in the leading pack on his RW Racing GP Kalex KTM, when a mechanical issue saw him fall back through the field, the Spaniard recovered to set his fastest lap only to later crash out of the race.
Seasoned campaigner Hector Faubel lost the front of his Bankia Aspar while racing with Oliveira, Jakub Kornfeil was also competitive for most of the race on his Redox-Ongetta-Centro Seta FTR Honda only to crash out seconds after Faubel.
Neither of the British riders finished the race after Danny Kent crashed while racing team mate Arthur Sissis for position on the Red Bull KTM Ajo, Danny Webb who came into the pits on the opening lap along with Jack Miller met him again when the Mahindra and Caretta Technology bikes crashed together later in the race.
Efren Vazquez had a nightmare race for the T-Shirt Laglisse team as he crashed on the warm up lap.
Italian rookie Romano Fenati crashed out early in the race while trying to make up places after qualifying down in 21st, he suffered a damaged exhaust with 22 laps to go and could not rejoin the race.