guys, i need your help. i have just installed a uni air filter (foam). and what happened is that the pereformance are... well...
i've understand that i need to do some changes in the carbo's, cause now more air is getting in (the last filter was the genuine one - cardboard.
what do i do? (try to be specific, i'm not a great expert but i'm ready to do it).
thanx, gs from israel

You probably want to change the jetting.  Check-out
http://www.angelfire.com/mt2/mikesgs500/rejetting/Rejetting_Matrix.html
to see what jetting you might want.  Then see the instructions for changing jetting at
http://www.angelfire.com/mt2/mikesgs500/rejetting/index.html
and at
http://www.gstwin.com/carb_work.htm
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Did you oil the filter?

Unlike the K&N In-Airbox Stock Replacement filter (SU-5589), the UNI does not come oiled from the factory.  If you haven't oiled it, you are probably getting more air throughput than you should, and the bike is running extra lean.