Hey guys,

My 2010 XTX has a problem.
It feels like the bike is misfiring or not firing when running in a low RPM setting.
During Idling it sounds and feels just like its not firing one stroke from time to time. it also happens when riding (80km/h 5th gear for example) its just a total loss of power for half a second or shorter.

Now I am familiar with surging and i am used to it, but this feels like a misfire.

Now the bike has a DNA stage 1 and the snorkel is removed, but I done that over 2 years ago. Also has a Iridium spark plug that has done a little over 10.000km. I have brought the bike to the Yamaha dealer and they didn't find any problems in the ECU. I myself have cleaned the filter and even fitted a new (spare) spark plug. but it haven't fixed the problem. I even fitted the old stock filter.

Any idea's?

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2010 XT660X