The K&N KA-7408 is a replacement engine air filter for the Kawasaki KVF750 Brute Force, listed for the 2008–2011 model years. It takes the place of the factory airbox element, so the stock intake layout stays in place and only the filter changes. Confirm your exact model year before ordering.
Choosing this over the stock element is a closer call than the brand's reputation suggests. Owners on user forums describe the stock Kawasaki filter as a good two-stage foam design, and some riders report that a K&N will dry out and let dirt through in really dusty conditions. Others found no gains from a K&N, and with the prefilter fitted their machine began to run rich. Forum reports on performance are mixed, so do not expect a proven horsepower gain. In heavy dust, a well-oiled two-stage foam filter is the conservative choice.
Owners on user forums are split. Some consider the stock element a reliable foam filter, while others say K&N elements can dry out and admit fine dirt in very dusty conditions. Keeping any foam element well oiled is the common advice from those riders.
Per user forums, the most common cause is the crankcase vent needs to be rerouted. Owners also report that the engine forces oil into the airbox while riding on rough ground, jumping, or doing wheelies.
This is an element swap at the airbox. Owners on user forums report that the machine won't run right without the box fully on, so make sure the airbox lid seats completely after you change the filter. If oil appears in the airbox, check the crankcase vent routing before blaming the filter.
