I have same question.
What's better solution also because I have o2 mod already from kev, I have think to buy Power Commander, and get it on dyno. But now I'm not sure what to do, ECU reflash and disable o2 but then I can't see power chart, and how I can now that I will get suitable map for my xtx
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XT660X 07.
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Akrapovic 2in2, DNA Stage 1 and 2, Kev's O2 eliminator, fuel mod
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