"I was feeling quite tired in that last race. I was feeling a bit shaky because my body has not yet recovered from the bug I had," Cooper said.
"I didn't have full strength in my grip on the bike. When the track got quite rough in the last race I didn't want to push too hard because I wasn't feeling that great.
"The whole bike is stock at the moment. We haven't really even started testing. The power though is unreal for a stock bike. I would have had Yoshimura mufflers on the bike but when I pulled them out of the box they were two right-handers and so wouldn't fit on the bike anyway.
"So, with nothing having been done to the bike, I'm really pumped with how good it is. The suspension setting we used was the first setting that Mark Scobie from M-Spec has made for me and it was pretty good. We have some more tuning to do, so it should be even better.
"I'm just going out each weekend at the moment and not too worried about where I finish, just going out and riding as well as I can."
In terms of preparation for the 2019 New Zealand Motocross Championships season, Cooper has plenty of time on his side to complete his bike's fine tuning.
He said his next big outing would be to race at the Honda Summercross near Whakatāne in December, with the big annual Honda New Zealand Motocross Grand Prix to follow at the end of January and then the start of the four-round New Zealand Motocross Championships in Taranaki in February.