His side went up against a much bigger pack against Kawerau but Kaine said the team looked to use that size to their own advantage.
"We used our speed to make them run around and wear them out a bit."
Despite moving up into a higher division, Kaine's side haven't been daunted by the move. In fact it appears to have motivated them to exceed.
The young team haven't lost a match so far this season - a record of which team co-coach Liam Coleman was proud.
"We are preparing for a national tournament in early September. So to help prepare the boys [who weren't] getting the stronger competition they needed in the under-15s.
"We moved them up, just to give them more of a test basically, playing bigger more physical boys than they are used to. That's helped them to do things a bit better and remain unbeaten."
The coach said Kaine had combined well with his midfield partner Jayden Savage to make a potent attacking force this season.
"They are two pretty gifted fellas with a bright future ahead of them. So we look to them to provide that direction and leadership on the field, in terms of the backs anyway. Obviously they're two very skilful, gifted players," Coleman said. "As far as the 1st XV goes, these fellas are the next ones through. Just to have the likes of Kaine and Jayden there is reassuring for us and the coaches at the 1st XV level."
Coleman, who is a flanker for Whakarewarewa, said he was also impressed with the loose forward trio of Dorso Porima-Horn (blindside), Tapara Taingahu (openside) and Renton Barrett.
Barrett, a tall no nonsense No8 in the mould of Kieran Read also showed he had plenty of speed scoring two tries. His second was a solo effort where he received the ball from the kickoff and ran through several Kawerau players then used his pace to outpace the cover defence - running 60m to score between the posts.
Rotorua's loose forwards were a lot quicker to the breakdown, often turning over opposition ball and giving their backs quick recycled ball. Coleman said this was key to the team's success. "We're hard on [our loose forwards]. We look to them to maintain the high standards we're after and it's really pleasing when you see them play the way the did today."
The visitors showed glimpses of their potential but never really looked like threatening Rotorua's unbeaten record.
Their only points came in the 25th minute when right wing Desmond Neilsen intercepted a pass and raced 90m to score, which first-five Midas Te Kakara converted.
Kawerau 1st XV coach Craig Budd said he was disappointed with the loss but was sure the team would be stronger next year. "We're a young team. We haven't had a 1st XV in a couple of years and we will only lose four of these boys who are Year 13 next year.
"We got totally outplayed by a good under-15 team today but things look good for us for next year if we can retain this talent and a few coming through from our under-15. So all is not lost but just a disappointing way to go out."
The home side will play Rotorua Lakes High School in the final next week, after they beat Rotorua Boys' High School 3rd XV. The finals will be held at the Eastern Districts Ground, Paengaroa on Saturday August 18.
