Karepa had the lead going into the first corner, however after being overtaken going into the second straight the captaincy was decided only a few metres before the finish line, with Karepa flying down the last straight to take the win and remain unbeaten.
"This is the most memorable and proudest moment so far in BMX over seven seasons of racing," Karepa said.
Karepa and his team will race off against two current Australian world number one champions with New Zealand's own world champion Leila Walker from Cambridge leading the girls' team.
The BMX NZ Mighty 11 teams:
Boys: Karepa Heke-Kaiawha (Captain) Tauranga BMX Club, James Whyte (2) Mountain Raiders BMX, Logan Hall (3) Cambridge BMX Club, Daniel Butterworth (4) Rotorua BMX Club.
Girls: Leila Walker (Captain) Cambridge BMX Club, Megan Williams (2) Rotorua BMX Club, Brooke Penny (3) Te Awamutu, (4) Caitlin Flavell Rotorua.