i understand your philosophy. ive ridden both a 16mm phbg and 19mm phbg on minarelli v1 polini 75cc kits and they definitely feel different. i think the 16mm's throttle range just more accurately hits the lower and mid ranges than the 19mm while obviously not taking in as much air up top. i could be dead wrong with this...idk...i can assure you its a different ride (although the 19mm one didnt necessarily take off slow). ahhh its hard to say.