Hi all, I'm a newbie to Supermotards, Yamaha's and this great Forum.
So far since experiencing these 3 i'm smiling a whole lot more!

I have a XT660x 07 model with an injection system that has an Air sensor on the headers.

My Dearest Wife brought me Stage 1 and Stage 2 DNA filters for christmas and i'm keen to install them.

My question is, seeing as the 07 has a Air sensor in the Exhaust will i still need to adjust fueling or will the Air sensor see a lean burn and tell the ECU to inject more fuel to compensate?

If this is not the Case, i'm a little confused to what I have to do to correct the fuelling across the range, do I:

Adjust CO from the Dash?

or

Adjust the TPS?

Or Both?

I'm not so keen to cut into the Original Loom for 'Kevs Mod' but noticed Kev mentioned that his mod does not suit my year anyway?

do i have to bite the bullet and hold off till i can scrape the pennies together for a PCIII??

Thanks for any advice in advance.