If it is spitting back while steady cruise I would raise your needle .04-.05 or so. Maybe go up one size on slow jet and make sure your air fuel screw is adjusted properly. It is very popular to replace the stock needle with a N65C needle (early per acc. pump sportster needle) also check for intake leaks after a while the seals around the manifold could be leaking causing a lean issue. I put over 80,000 miles on my 04 carb and it still looked good when I pulled it apart so unless you have really high miles I would not worry about it being worn out. The 44 would probably be a good match for you cams.
Last edited by Mtclassic; 05-14-2011 at 07:30 PM.