While apart for routine maintenance, I decided to have the head cleaned up and flowed. Just looking at it, my very meager amount of common sense noticed many areas that could be improved. Now that it is back together, WOW ---- look out. Very impressed. I would just say a very healthy gain accross the entire board (meaty). :confused:It has left me with one nagging side bar. 15% of the time, I now have a VERY minor hesitation from 0 to 1/8 throttle. The bike ran flawless before. This glitch has caught me a few times, you know a little blip to clear something etc. I guess my question is what circuit should I look at which would correspond to a better flowing head? Too rich or too lean? I am very un-knowledgable on the FCR. Any ideas would be great.