Very true, more air, fuel, more compression=more power =more torque=more speed or at least quicker to the top.
Originally Posted by dmb
back in the 70's the biggest atc was the 110 and we would go duneing [glamis] needed more power, honda used small ports to govern motors. we would almost double the intake port size. 24mm carb, cam, stroke to 160cc and much more power. morral of the story is ya gotta make it breathe [porting] to go fast