I have a 1996 Vulcan 1500 c. I placed a stage one jet kit in it last year and the jets are 116 both front and rear. This year I replaced the rings because it needed it. Since the rings have been replaced the bike moves at the start but is sluggish in the middle until it hits a certain rpm then it takes off. we checked the timing and for vacuum leaks and nothing is wrong. what else could it be? should I place the old jets back in? Any help would be great thank you!!