I've had both the pumper and of the course the stock. I went back to the stock carb because I'm weak and puny and the heavy return spring after all day in the saddle was just intruding too much into the ride.
Short story short. I used the PC jet kit on the stocker and to be honest the difference between the two is nil.
I adventure tour the bike for reference
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"Every bike I ever had, was the best bike I ever had, when I had it"