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K&N Replacement Air Filters are designed to fit right into the standard OEM airbox. No modifications are required by the owner, no jet changes or adjustment of the carburetors is anticipated or suggested.

Customer modification of the standard airbox - removing the cover, drilling holes into the side or top will have a drastic effect on smooth carburetion. Modifications will cause the stock system to run lean and reduce horsepower. Keep your motorcycle stock and the new K&N Replacement Element will be good for the life of the engine.

For all Off-Road Dirt Bikes and ATV'sK&N Replacement Air Filters are ideal for extended use in dirty and dusty off-road riding and provide clean carburetion even at high altitude.

As a rule, no jet changes are required with just a K&N filter element, however the spark plug condition should be checked for proper mixture after the first few miles of riding. If the airbox has been modified for increased air flow, the main jet size will need to be increased to provide the proper fuel mixture.

SERVICE HINT: Do not clean the K&N air filter too often. When a drop in performance is noticed, or the machine becomes hard to start, it is time to service the filter element. The dirt build-up actually helps stop more dirt and does not hinder the airflow.