Harbour skipped out to 22-10 after they found another hole in the Bay backline. It got worse before the break when a charged clearing kick fell into the Harbour hooker's arms for a simple try, and then Harbour stretched Bay's defence on their right hand edge.
Winger Mason Walker scored a well-worked try right on half-time and his Mount teammate Danny Kayes scored in the opening play of the second spell to get the Bay back in the game trailing 34-22. But a simple missed tackle let Harbour in to regain their margin and the initiative they never relinquished.
Harbour's backs looked good, really good, as they ran further tries in at will. Evemy and Walker scored their second tries for the Bay, and replacement Arron Carroll one in injury time to make the score respectable.
Bay of Plenty Development 43 (Nick Evemy 2, Mason Walker 2, Danny Kayes, Arron Carroll tries; Evemy 5 con, pen)
North Harbour Development 57 (Jona Tuitoga 2, Josh York 2, Adrian Smith, Leigh Thompson, Tim Blundell, Ritchie Ah-Chong tries; Blundell 4 cons, 3 pens).