my f3 has erion exhaust, and the guy i bought it from said he didnt install a jet kit? do i need to get this done? and what will this do for my bike? aka gas mileage and power? what should i expect to spend? can i do this myself or should i take it to a shop? thanks!

 

They are about $90. If you haven't done it before don't try because it comes with mutiple jets so it may take a few tries. You may gain a few hp's and your gas mileage will decrease alittle.