I contacted my dealer today, asked about the surging and whether there was a fix for it.

I let them know that I know reasonably what I'm talking about and also mentioned xt660.com!

They said bring it in and they'll have a look. So we'll see!

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09 XT660X:

CCC Stainless Rounds, Stage 1 DNA, Stage 2 DNA, PCV With Custom Autotune Map, PCV AutoTune, Home made O2 eliminator, Self machined Fork Spacers, DIY Autotune Switch.