Air Filter backfire screen

Is there a performance gain in eliminating the stock air filter housing backfire screen? I have purchased aftermarket performance air filters but they did not come with a new housing. It looks messy to cut the screen out of the stock housing. Does anyone make a housing without the screen and does anyone believe it helps to eliminate it? :)

I did it to my 03WR450, last mod I did....didn't notice a big increase in power, but it did clean up a little richness in the midrange that showed up after I put the DWR needle in. So....it did a little bit more on top of everything else. But it was a PITA to cut and clean out all the screen, I prob'ly wouldn't do it again. The YZF guys are lucky, they can just get a 2-stroke cage and put it in....won't work with the WR air box, as far as I can tell from the 'fiche.

Is there a performance gain in eliminating the stock air filter housing backfire screen? I have purchased aftermarket performance air filters but they did not come with a new housing. It looks messy to cut the screen out of the stock housing. Does anyone make a housing without the screen and does anyone believe it helps to eliminate it? :)

The reason why Yamaha installed the Backfire Screen was because too many people for some unknown reason use gasoline to clean there filters. :D When they don't air them out enough and re-oil them the gas stays in the filter. Without the backfire screen the air filter can ignite and you can have a hotseat! :) If you use the proper cleaners and stay away from gas it should be O.K. to eliminate the screen. I don't know if you going to get that more power though. :D

I did it to mine also. Got rid of that anoying little air filter screen "whistle". Better air flow for sure.

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