Hello Right got kevs fuel mod and the controller, set it up as described and took it down to a dyno today and was slightly confused, ill give you a breakdown of my bike

XT660 - 2009
K&N Air Filter stage 1
Snorkel Out
Kev Fuel Mod and 02 Controller
Akrapovic Half system with Cans baffles out

when set up and running on the rolling road it was running very lean, adjusted kevs fuel mod to about 3 o'clock as recommended in the instructions for the set up that I'm running, now in order to make it richer we had to re introduce the snorkel and have the fuel mod turned all the way up to 12, it was only then we were getting a healthy reading off the dyno but obviously we lost a little lean power.

Any advice on this ? anyone else running a similar setup, or have any advice that they could share please? ill attach the dyno printouts if i can figure out how to add them.

any advice would be massively appreciate it