i will never run race fuel again, unless I ever built a drag bike. The gains are minimal, especially on a play bike. running 93 in mine and ill never change it. I ran 110 in my old 4 mil with 35s and clearly spent an arm and a leg on a motor that drank gas like ddq drinks whiskey. On my 7 mil i have it setup for pump gas (155 psi) and have a stronger torque curve (a few more peak hp) on this motor than my race fuel 4 mil did, i say bigger stroke on pump gas and save money overtime.