So I ordered my Yoshimura exhaust for the 2012 650 yesterday and am patiently awaiting its arrival :mouthwate . I took in my bike to a local shop for its first maintenance checkup (recommended by a lot of the military people here) and I noticed a GXR750 with a blown engine. I asked the mechanic about it and he informed me that the bike was run with an aftermarket exhaust (2Bros) and since the tune for California motorcycles is leaner than those of other states you would need a power commander so it balances the ratio and doesn't leave me with the same fate as this GXR. Mind you I didn't inform him that I purchased an exhaust but now I'm a little hesitant to install it right away. Can anyone give me any advice on this? I looked up the PC maps and I found none for the 2012 Ninja w/ the Yosh pipe and one alternative which is the autotune add-on which would bring the total to around $600. Thats just not feasible right now seeing how I just purchased my exhaust. Does anyone have any info on this?