I just recently purchased a 94' Suzuki RF600R and it runs pretty damn strong for having 31K on it,I have one problem though it starts fine and I let it warm up then I get down the road I give it gas and it goes flat then just about dies,the guy I bought it from he put a stage 1 Dyno jet kit in it,also has aftermarket Vance & Hines pipe on it, K&N filter too,he seems to think it's the needle valves are worn is he right?Does anybody know?and if so where would be the best place to get needle valves?any help with would be greatly appreciated.