hey guys dunno if this is a stupid question or not but ive got a dhz140 with comes stock with a 30mm carbie i have been doin litle mods to it to make it go faster and was reading through the preformance upgrades guidlines and it says a 140 would run best with a 26mm carbie if i have a 30mm on it now is that just down grading or will it make my bike a lil faster ?