That is pretty damm good, what A/F ratio @ a steady state cruise?
Did you get your 5 speed working better?
Did you fix the transition problem w/the carb, if so, what did you do?
I run my Syclone @ 15.3-15.6 depending on engine load.
But it is EFI & it seems to like being that lean, no hick-ups or burbles etc.
MBHD