The unpredictable Assen weather was to play it’s part in all the classes though Moto3 escaped the worst of the weather as they took to the track first under overcast skies.
The race was action packed from the first lap to the last with Championship leader Jack Miller one of the first fallers along with Enea Bastianini, while Romano Fenati rode through the chicane to finish the lap 30th, he recovered only to fall later in the race, maintaining the points difference between himself and the Australian in the process.
Amid all the drama it was the Estrella Galicia riders who were to benefit as Alex Marquez powered into the lead, which he maintained to the end bar a wobble which allowed Alex Rins to briefly catch and challenge.
The Honda pairs 1-2 also moved them into the title hunt with Marquez on equal points with Fenati and Rins just three points behind them.
It also marked Marquez’s first ever sequence of back-to-back wins in the championship.
An excellent ride from Miguel Oliveira gave the Portuguese rider his and Mahindra’s first podium finish of the season in third.
Fourth was snatched by Ongetta-Rivacold rider Alexis Masbou as the tight battle for the positions of fourth to tenth hit the finishing line with nothing between them.
He narrowly beat Niccolo Antonelli in fifth(Junior Team Go & Fun Moto3), while Efren Vazquez gave a rough and ready performance, swapping paint for sixth(SaxoPrint-RTG).
Team Calo rider Isaac Vinales took seventh ahead of Husqvarna’s Danny Kent in eighth. Fellow Brit John McPhee was tenth on the second RTG bike sandwiching Ambrogio’s Brad Binder who rode home ninth.
The remaining points went to Jakub Kornfeil in 11th, local wild-card Jasper Iwema in 12th, Matteo Ferrari in 13th, Zulfahmi Khairuddin in 14th and Phillipp Oettl in 15th while a massive crash at the chicane ended the points hopes of Alessandro Tonucci, Luca Grunwald and Juanfran Guevara.
Grunwald received applause for picking up his bike and walking it over the line.
Front row starter Niklas Ajo was fit to ride after picking up a left hand contusion in a warm up crash to add to his dislocated shoulder from Catalunya, but had another huge crash to end his race hopes.
Francesco Bagnaia was declared unfit after fracturing his left wrist in warm up.
Moto2 saw the heavens open and reluctant wet weather specialist Ant West rose to the top in the tough conditions for QMMF.
It was the Speed Up riders first win in eleven years, the last coming in the 250cc class in 2003 – also at Assen. It was to be a hard earned victory as he held of the rapidly approaching yellow bike of Maverick Vinales.
Vinales overcame his dislike of the wet to get into the leading group as the title leaders faltered and more experienced riders fell.
Tha Paginas Amarillas HP 40 rookie rider found his confidence as the track dried and looked ready to pounce for victory but was well held off by the Australian class veteran.
Mika Kallio was safe in third as Luis Salom’s late fall left him to cross the line for Marc VDS solo.
Johann Zarco gave another strong performance for Caterham in fourth, while Alex De Angelis was another rider calling on experience to lead him to fifth for Tasca Racing.
Tom Luthi’s late charge put him sixth ahead of Italtrans rider Julian Simon who recorded his best finish of the year despite fading from third.
Title leader Tito Rabat found himself down in eighth, the Spaniard had crashed on the warm up lap as the rain arrived.
Also setting a personal best was Lorenzo Baldassarri in ninth ahead of Hafizh Syahrin’s who’s Petronas bike also made the top ten.
Gino Rea impressed in 11thonly just missing out on a top ten finish on the final lap after powering up from 33rd on the grid for his best finish this year. Though Syahrin passed the Londoner he held off Marcel Schrotter’s Tech 3, with the German being forced to settle for 12th.
Simone Corsi crashed while leading by more than 11 seconds but recovered for points in 13thahead of Taka Nakagami in 14th and fellow faller Salom in 15th.
Many of the usual frontrunners did not figure as they paid the price for choosing the wrong tyre, though Jonas Folger had the worst luck as his re-entry to the pits to make changes also earned him a ride through penalty for speeding in pitlane.