Irwin initially struggled for pace in the opening moto, with the team still finding the best set-up for the Northern Irishman. With the races featuring a combined field, Irwin battled through the mid-pack to finish eighth overall in the MX1 class.
After some more tweaks to the settings on his RM-Z450, Irwin carded fifth and sixth placed finishes in the weekend’s final two races, to secure fifth overall.
He said afterwards, “The weekend was really good. I had a good qualifying; I was third in my session but when they put the times of the two groups together I was fifth.
“But the first race on Saturday was just terrible to be honest; it was my mistake. I changed the settings of the bike; I just wanted to improve the bike and let’s just say that it wasn’t right. So on Sunday we changed the rear shock and changed the setup.
“In Sunday’s opener I had a good start, crashed on the first lap, but I got back to fifth and was happy enough with that. In the last race, I hit the gate and was dead last, came all the way back to sixth.”
Luke Burton suffered a crash in the opening race after the start, suffering concussion and was unable to complete the weekend.