I purchased the new fuel screw from Pro Circuit thinking I was making the best choice since it seemed to have the newest design in fuel screws. Boy was I wrong. Not only did the fuel screw come all scratched up, the threads got worn from only threading in the carb one time. The material is way too soft compared to the threads in the carburator. And after looking a little closer I noticed that the dimensions of the tip was different than my stock one (shorter , the taper was not proportioned the same and the tip at the top was half the size) Needless to say my bike ran like crap. So I recommend NOT buying one. I guess I should of stayed with the older brown version.