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FJR Motorcycle Forums
Technical & Mechanical Problems
Gen III (2014) with aftermarket air filter and 2 Brothers Exhaust
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<blockquote data-quote="RossKean" data-source="post: 1195119" data-attributes="member: 19880"><p>There is a lot of controversy about the effectiveness of filtration of the K&N filters. Some have claimed that they allow fine particulate to pass that would otherwise be stopped by a quality paper filter. They are "supposed" to breathe easier but getting enough air to the cylinders has never been an issue for the FJR - the beast already runs lean. The K&N certainly will not give you a bunch more horsepower!</p><p></p><p>If you use a K&N, the correct amount of oiling after cleaning is critical. Not enough and you will certainly have less filter efficacy. Too much and you will effectively remove the free-flowing nature of the filter and possibly mess up fuelling (and will likely gum up the airbox with some of the excess oil). My bike (bought used) came with a K&N filter. I swapped it for an OEM filter at the first major service.</p></blockquote><p></p>
[QUOTE="RossKean, post: 1195119, member: 19880"] There is a lot of controversy about the effectiveness of filtration of the K&N filters. Some have claimed that they allow fine particulate to pass that would otherwise be stopped by a quality paper filter. They are "supposed" to breathe easier but getting enough air to the cylinders has never been an issue for the FJR - the beast already runs lean. The K&N certainly will not give you a bunch more horsepower! If you use a K&N, the correct amount of oiling after cleaning is critical. Not enough and you will certainly have less filter efficacy. Too much and you will effectively remove the free-flowing nature of the filter and possibly mess up fuelling (and will likely gum up the airbox with some of the excess oil). My bike (bought used) came with a K&N filter. I swapped it for an OEM filter at the first major service. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Gen III (2014) with aftermarket air filter and 2 Brothers Exhaust
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