The Italian told media afterwards that he struggled particularly with the fast changes of direction among a few problems he had.
"For sure it was a difficult weekend. I tried my best with my team. I tried practice by practice. The feeling wasn't at 100 percent," Iannone said.
"It's difficult to manage the bike and especially the change of the direction. It's better this weekend about the bike. For sure I have more feeling compared to Barcelona. I want to improve, especially for the Sachsenring.
"Especially the change of direction [was the biggest issue]. I think the rear don't help me to stop the bike. I push a lot braking in front. I stay at the limit," added Iannone.
"In the change of direction when I use the front brake it's really strong. In this track this is a big disadvantage," he added.
In the MotoGP rider’s championship standings, Iannone is in third place on 107 points. The top two places belong to Yamaha duo of Jorge Lorenzo on 153 points and Valentino Rossi rules the roost with 163 points.
Next on the calendar is the German MotoGP at the Sachsenring on July 12.