brd Posted September 10, 2012 Share Posted September 10, 2012 The uni filter has a foam side and a metal backing on one side. When I took it off, the metal side was up (facing outside air) and the foam was down (facing inside the airbox). It seemed to me like you'd want the foam side up so incoming air would hit it first and the metal side in to support things, so I flipped it around. Is this incorrect? Link to comment Share on other sites More sharing options...
Veefer800Canuck Posted September 10, 2012 Share Posted September 10, 2012 You are right, the foam needs support against the incoming airflow, therefore the metal screen should be on the bottom. Link to comment Share on other sites More sharing options...
Member Contributer JZH Posted September 10, 2012 Member Contributer Share Posted September 10, 2012 You'll want the screen there...for when the foam starts breaking down and crumbling like mine did! Ciao, Link to comment Share on other sites More sharing options...
enzed_viffer Posted October 8, 2012 Share Posted October 8, 2012 I just ditched my home-made Unifilter, after 5 or 6 years of use, and bought a BMC instead. The main reason is that the Unifilter foam was a pain to wash and re-oil (at least with the super-tacky spray-on dirt bike oil I used). My first impressions were quite good, apart from the BMC's frame having a slight curve to it, presumably imparted during shipping, but of course when the airbox cover screws were tightened it straightened out and clicked into place OK. On the first ride the bike seemed to run better, allaying my fears of it maybe running a bit lean due to the surface area being effectively twice the size, and the filter being thinner. Link to comment Share on other sites More sharing options...
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