when is it ever necessary to change the slow jet? what mods would warrant changin it? would i gain anything by goin bigger on the slow jet? my bike runs great and pulls good all the way to top speed, although with my big ass and windshield and saddlebags on my evolution heritage softail tops out about 90ish. there might be an ever ever so slight hesitation if i let completely off the throttle, then roll it on right at the inital point of givin it gas a little pop if you will. would a .45 slow jet help? (.42 in it) sorry so long, any help would be appreciated.