Looking at my dyno graph the AF ratio max and min lines are at 12.5 and 13.5 for max power. I dont think you are that far off (mine was much richer mostly 11 and was losing me power) What is interesting is that even though my power was down on yours the shape was a bit better up top. Are you sure there is not something else messing up your top end?

stevie wrote:the "A" needles would probably be best as they are the leaner of the three choices, it will be main jets and needle taper you need to get rite.

The 'A' needles have the thinnest diameter, they are the richest ones. The 'C' needles are leanest.

thanks thats probably why it took me so long to get a good set up. lol. i stand corrected. iv never actualy put callipers on them i just took someones word on it as they had the same set up on there reace bike.