[jct842]

These gy6 motors are already making a lot more horse power than they were designed for initially. The 150s started out as a 110 as I remember and the makers started putting a bigger jug on them to get them up to 150, They still have the 110 case, crank, oil pump and all the rest so going much more in hp is going to cut into the longevity and reliability. These are not hondas.