I'm at 600ft ASL,030 over,trail port,20cc domes,TDR reeds,full fmf fatty's, stock carbs,K&N,full airbox with no snorkle,cover with 8x 1inch holes. At 65 deg F 27.5 pilots and 300 mains is what I gotta run. I have to work to keep the fronts on the ground. Them mains to me are way to small , you have gotta be running lean.