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Best air filter I can get to improve power.
Not going to get anymore hp just from an air filter. The air filter is not the limiting factor on these. The most limiting factor is the 2 valve & push-rod intake and exhaust system. You can only flow so much fuel/air and exhaust through that. Then you have an air cooled, relatively low compression engine. You have a dual layer foam air filter very similar to what a 60hp CRF450R runs. And even in that the foam air filter is not the limiting factor.
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