Continuing to progress on the team’s RM-Z450 machine, Irwin took two fourth placed finishes in the opening two motos, battling at the front after a good start in both, but found himself in fourth place when it mattered.
The final moto saw Irwin make a slower start as the gates dropped, and he found himself in the mid-pack. He worked his way through the field but could get as far as seventh place at the chequered flag, securing fifth overall.
He said, “Qualifying went steady enough; sixth and went to fifth in superpole, which I was happy enough with to be honest.
“In the first race I ended up fourth, had a good battle with Whatley and in the first couple of laps was right behind the leaders. In the second race I was fourth again, and seventh in the last race.
“It was the worst start of the day and it became quite hard to pass at the end of the day. I think the speed to come fourth depended on the start.
“I knew I had to beat Kristian [Whatley], but that didn’t happen, so we ended up fifth overall, but only a couple of points off the podium, so I’m happy enough.”