2026 Kawasaki STX 160LX whine

I have a new Kawasaki STX 160LX and have concerns with how the ski sounds when accelerating.  At low RPMs (<3000) it has a throaty sound but around 4000 it starts to whine at a fairly high pitch, almost as if a turbo had kicked in (there is no turbo).  This continues until the ski gets on plane and then goes away, the ski then sounds/runs smooth and relatively quiet.  I don't have anything to compare this to so would like feedback on whether I should be concerned.