Vinales, Bradl on pole in Assen
Maverick Vinales took his second straight pole position in 125cc qualifying at Assen while Stefan Bradl dominated Moto2 yet again.
Spanish rookie Vinales (pictured) beat Johann Zarco to the top spot by just under two tenths of a second, with Sandro Cortese completing the front row.
Hector Faubel, Luis Salom and Efren Vazquez were next up.
Silverstone winner Jonas Folger crashed at the chicane right at the start of the session but rejoined later to take seventh.
Championship leader Nico Terol will start only eighth - having already crashed and hurt his hand in the morning, he had another accident near the end of qualifying.
All three men on the third row fell during the session, ninth-placed Sergio Gadea having also taken a tumble at the chicane early on, which briefly left him stranded in the middle of the track with other bikes dodging around him.
The session saw a heavy but brief rain shower right at the start. At that point no one had managed a proper flying lap and home rider Jasper Iwema sat on provisional pole. Sadly for the Dutchman, conditions improved quickly, and he was left 33rd after crashing later on.
Runaway Moto2 championship leader Stefan Bradl took his 2011 tally to six poles from seven races in a wet session at Assen.
The rain held off for long enough for all the frontrunners to get at least one flying lap in, but then fell with a vengeance - leaving no chance for anyone to set any quick times in the majority of the session.
Kiefer rider Bradl had managed to put in a 1m39.305s by that time, which gave him the top spot by 0.3 seconds over 125cc champion Marc Marquez. Simone Corsi completed the front row, having briefly held provisional pole before Bradl assumed his usual position.
Tom Luthi, Yuki Takahashi and Aleix Espargaro were next up, with Kenan Sofuoglu, Scott Redding, Michele Pirro and Bradley Smith rounding out the top 10.