To test it, I did my bike in stages.
I had the head done first. Major power improvement.
Then I got the carb done. The biggest thing I saw was that I no longer had to go super lean up in Flagstaff, Arizona (9,000 feet) to keep the bike from blubbering. I also could go one size leaner down in Phoenix during winter.
Old jetting 175/45 for Phx winter and 162/38 for Flag in summer.
After the carb mod it is 172/42 and 168/38.
I could go leaner but I like the motor behavior when it's a little rich.
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