So I got this 97 zx9r with 17,000 miles but the guy I brought it from said engine was replace with one that had 6,000. Any who I was told it needed a new diaphragm and battery. I went and got both and a new fuel pump. Now the fuel pump wire were all jacked up and I plan on rewiring them with some crimps. It has a K&N air fliter and a full muzzy exshaust system. He told me that he never Rejeted his carb or synced it with the mods. It runs good over 3pms and up but when it's below that it seems hasatint and when it idles it seems like it wants to cut off some I keep it reved at idle so it does not. My question is will a new jet kit fix this problem? Or does it need somthing else? Brand new plugs were just put in plan on changing the oil soon.