Air Filters

BMC street / K&N / Stock

BMC		K&N		Stock

BMC Street: This is what I currently have on the bike.  The lightest of the 3 filters in weight.  Said to flow alittle more than stock, biggest advantage is that you can clean it like a K&N and reuse it.  The filter element is very similar to stock in shape and size, body made from hard/lightweight plastic, oiled cotton element.  Less densely pleated than the K&N.

K&N: Had this on the bike for awhile, didn't really feel any gains.  Infact, alot of dyno runs by members of www.fireblades.org have shown that the K&N will actually cause you to lose 1-2hp when installed on a 929 (some other bikes do see gains with a K&N installed).  I got it cheap used so I figured I'd give it a try.  Wasn't till I had all 3 filters side by side that I realized that the K&N has a smaller filter element than the stock or BMC.  The K&N's body is made from rubber, oiled cotton element.

Stock: Most recommended filter to use by 929 owners.  Said to flow better than the K&N.  Only downside is it's costly and non-reusable.  Never had a fuzzy feeling about the metal grate on the back of a stock filter, doesn't look like it'd help much in air flow.  But in Dyno testing, the stock airfilter always preformed well.  Body is made of hard plastic, Paper element.

Wish I had the time and money to test each and get a nice graph to show....donations anyone?