Club officials were alerted after a police officer noticed a council gate to the Roy's Hill park, neighbouring the raceway, was open about 2.15am, and then found a gaping hole in the club fence.
Club president Craig Spargo and his wife headed to the track and discovered the five locked shipping containers had all been opened and the training karts had gone.
"It was gutting," he said. "They definitely came with the right tools." He was unaware until later that the Murphy team's kart and trailer had also gone.
While club members tried to recall if there had been unfamiliar faces around the track in recent times, a special focus was the movements of any large vehicles on SH50 early on Sunday, and on the steel-sided trailer, which had a yellow, black and green KartSport sticker and also the number 51 on the top right-hand, rear corner.
The club has about 70 racing members and many were at the club day on Sunday when Mr Spargo's son, Cameron, 13, was thrown from his kart and broke his right leg. He is expected to be discharged from hospital today.