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Author Message   F22raptor Posted on Sunday, February 14, 2010 - 10:20 pm:        I have a 2007 XB9R and am installing the American sport bike carbon-fiber airbox cover with the open snorkels(Very trick looking part!!)and air-filter element cover.I know it is necessary to run the breather line to a catch-can,BUT,this is my question.... I am a 25yr. master auto tech well as a factory certified Honda motorcycle tech,and cannot figure out how the breather re-route could add or free-up any H.P.I have seen claims of 1-5 H.P gains backed up with dyno runs.It is easy to see how the improved air-box flow along with improved fuel map would help,but the breather lines??? Please answer if you have any real world experience,thanks in advance,Brian   Froggy Posted on Sunday, February 14, 2010 - 10:56 pm:        The PCV pumps a ton of hot and dirty air into the intake. Oil and other impurities that come out the PCV will clog up the air filter faster.

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