One of Kawasaki’s best selling sport bikes is the Ninja EX250R. All new bodywork sweeps back to a clean tail section, similar to its supersport and superbike cousins. In work performance it’s considered a scrapper and riders often wring the Ninja’s throttle to the stop as they hover near the indicated 13k redline. K&N's KA-2508 replacement air filter for the 2008-2012 Kawasaki EX250R Ninja 250 K&N has released a new replacement air filter (KA-2508) designed to increase horsepower and torque while providing great filtration. It fits the 2008, 2009, 2010, 2011 and 2012 Kawasaki EX250R Ninja. This washable and reusable K&N air filter was designed with a contour shape to fit in the OE air box for an air tight seal around the perimeter of the air filter. The thin tapered side goes into the air box first during the simple installation. The KA-2508 is backed by K&N’s Million Mile Limited Warranty. It will be the last air filter your Ninja will ever need. Use the K&N application search to find all K&N products for your motorcycle or automobile then use the K&N dealer search to find a K&N dealer near you.