Originally Posted by bobbed06
I prefiltered my atv airbox lid with a piece of old cut up air filter and hot glue. I didnt notice any jetting changes required. I will be doing the 3x3 on my DRZ airbox in the near future as well. It really lengthens the air filter life and service intervals.
In the 90's I had a DT200R that had been done up by a pro, it also had a make shift sponge foam pre filter over the opening cut in the air box, somehow I am going to rig one up for the DRZ. Looking at it yesterday I was thinking of bending up a bit of 6mm wire into a frame to hold my pool filter sock.