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K&N YA-2509 4.5 out of 5 stars 4 Customer Reviews
Replacement Filters > Replacement Air Filter

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YA-2509
 
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K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for virtually every vehicle on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty™ and will be THE LAST AIR FILTER YOUR VEHICLE WILL EVER NEED. [More Information on Replacement Air Filters]
  • Designed to boost horsepower and rate of acceleration
  • Can be cleaned and used again
  • High air flow with exceptional filtration
  • Lasts up to 50,000 miles before cleaning is required depending on driving conditions
  • Works with original equipment manufacturer vehicle electronics
  • Emissions legal in all 50 US states
  • Will NOT void vehicle warranty
  • Million Mile Limited Warranty®
Available Information
YA-2509 Cross Reference
YA-2509 Vehicle Applications
Product Flyer - Product Press Release
News Story - 2009-2013 Yamaha XT250 Improves Overall Performance with K&N Air Filter


Part YA-2509 Product Specifications
Product Style: Unique Air Filters
Air Filter Shape: Panel
Filter Material: Cotton Gauze
Flanges: None
Height: 1.063 in (27 mm)
Package Contents: 1 Air Filter
Package Quantity: 1
Filter Re-Oiling Amount: 0.12 oz (4 ml)
Length: 5.188 in (132 mm)
Width: 2.688 in (68 mm)
Weight: 0.39 lb (0.18 kg)
Product Box Length: 7.72 in (196 mm)
Product Box Width: 1.75 in (44 mm)
Product Box Height: 9.69 in (246 mm)



Product Reviews    See all reviews!  Review part YA-2509

 This filter is a huge improvement over the stock paper filters. Right out of the box I noticed a little bit of a low end pick me up and a tiny bit better throttle response. For the 30 buckd to not have to screw around buying new filters I would highly recomend the investment. This filter seems to seat better then the stock filter having a rubber gasket as opposed to the the styrofoam gasket that leaked in pebbles and let dust on my 2014 xt250.
Daryl, British Columbia, Canada
 Out of the box I noticed the filter did not fit the airbox well. Too the point I thought it was maybe the wrong part number. It's been awhile so I'm going off of memory but I think the cover did not fit well once the filter was installed. Went for a test ride and anything over 55mph the bike just fell on its face. A testament to the increased air flow I suppose so I will have to try to jet up. Not sure how easy it will be to get main jets for a Teikie carb? According to the literature no fuel modifications are necessary! Not sure how this could be true as these bikes run so lean due to EPA anyway. All my vehicles have K&N filters in them and I love the product but this one has been disappointing. My filter sits on a shelf in the garage until I locate jets and have the time to tune.
Monte Stage, Hibbing, Minnesota
 This filter fits my XT250 perfectly with no mods or jetting. It's probably my imagination, but it seems to breathe easier with better throttle response. I'm considering another one as an onboard spare.
Bill, California