I really need more time with it.. I gave it one shot the day I got them on Thursday and it was the one time when I left the air filters off and it was on the street during a bad time of day and I only got one time to kind of really open it up which I really don't like doing in town.. they didn't seem to flick open but bobbled like normal and maybe a little bit more open. But I didn't have really a lot of time to hold It wide open... I think I still have room tolighten the spring and let them open up faster and more. That's what I was saying to yr about whether they need to open up more or I need a smaller jet to make that 11.5 go up to a 12.5...