Solves the bogging problem associated with 4-stroke Keihin FCR carburatorsFits most all FCR Keihin carbs (DOES NOT FIT CRF250R CRF250X CRF450R 2007-2011, CRF450X 2008-2011)Improved low end performanceEliminates hesitation and boggingReduced hot engine stallingInstant response to throttle movementBolts on product for all Keihin FCR carbs that requires no modificationsManufacturer offers lifetime warranty
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