Open Airfilter
 

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?

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.

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

Biggest problem with a cone filter and no airbox with fuel injection is getting an accurate and consistent air temperature reading for the ECU. In addition you'll have to fabricate a mudguard and something to fill the gaps to stop crud getting everywhere you probably won't save much weight anyway! Also in my experience (even with carbs) removing the airbox seriously robs your motor of torque in the low and mid range. The only bikes I've ever found that improve when removing the airbox are carb fed 2 strokes, but i'm more than happy to be proved wrong...

Not to prove anyone wrong but just to give the facts on these XT660 motors. I can provide a completely standard air box against the stage 3 air box dyno result, the results are similar to the attached dyno run below with a little loose in torque around 2000-2500 rpm. The length of the cone to the throttle body is important in how much torque these motors produce, Freez has done dyno tests to back my statement. So bolting on a pod filter directly to the throttle body would more than likely loose a bit of torque as mentioned.

The dyno results below are with an open air box stage 3 against the standard XT air box with stage 1 +2 filters.

Stage 3 in RED
Stage 1+2 in BLUE

http://i201.photobucket.com/albums/a...iltersBLUE.jpg

i absolutly do not wanna loose som torque...especially not in the low end and the middle....so i would have to have a cone between the filter and the throtle body.