Consistency has elevated Purvis from third overall at the start of the day at Pukekohe and move him up to the No.2 spot, a solid effort from the 18-year-old this season making his MX2 class debut.
Purvis is also leading the extra MX2 battle-within-a-battle for under-19 age group honours.
"I think we can head to Taupo in a positive mood," said Altherm JCR Yamaha Racing Team manager Josh Coppins
"I thought both Gibbs and Cooper rode amazing today. I was impressed with Gibbs coming back in that third race. He had to close that points gap. With the gap down to three points it means the championship is anyone's ... nine points would have been difficult.
‰ÛÏKayne is sitting solid in third and Maximus is now second in the MX2 class and leading the under-19 championship, so it's a positive weekend. It could have been better. We want to win, of course, but overall I'm happy."
Full results for the round can be found by clicking here