Just thinking...
on my old bikes from the 80ies i had before
i always had an K&N filter direct on the carb and than an extra on the crankcase.

would there be any reason not to do the same on the xtx?
- one main filter
- one for the crankcase
- making an ais mod

in this way you could even save some weight-

or am i just missing something?

I do not immediately see a reason to dismiss the idea, IF you never ride in the dirt or the wet. Otherwise I would definitely not do it.

It will require fueling modifications as well.

http://www.xt660.com/site/node/310

like that?

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jo like the stage3 but without the "heavy" box around and you would not need the rubbertube between the throtlebody and the filter.

and i should be lees expensive too.

from K&N you could even buy that extra "sock" to pull over the filter.
its against mud and dust

duibhceK....if i take the pc3 and make a map with the new filter than i should not need any fueling mod? or was there another problem you thinking about?

pc3 is a fueling mod in my book

I saw one of those on a car. A filter for a filter seems to defeat the object.

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it is not a real filter in that way, just a safety feature.
but as i do with carbon i maybe could made an some kind of protection without building a big heavy and "airbraking" box