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K&N YA-2509 Air Filter

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.7 out of 5 stars   6 Customer Reviews
  • 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®
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 the majority of vehicles 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.

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Product Specifications

Air Filter ShapePanel
Filter MaterialCotton Gauze
Filter Re-Oiling Amount0.12 oz (4 ml)
Height1.063 in (27 mm)
Length5.188 in (132 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height9.69 in (246 mm)
Product Box Length7.72 in (196 mm)
Product Box Width1.75 in (44 mm)
Product StyleUnique Air Filters
Weight0.4 lb (0.2 kg)
Width2.688 in (68 mm)

K&N YA-2509 Air Filter Product Reviews

Thursday, January 21, 2016 - Part YA-2509
Perfect fit and the bike runs noticeably better. Been using K&N filter for over 25 years and they are in 4 trucks and 4 motorcycles and my lawnmower. If it has an engine, it has a K&N, even if I have to machine an air cleaner to hold one like for my lawnmower. Paper filters are a waste of money.

Boyd Bivens
Friendsville, Tennessee
Friday, November 13, 2015 - Part YA-2509
Fits with no problem increased airflow seems to be more responsive.

Las Vegas, Nevada
Monday, June 23, 2014 - 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.

British Columbia, Canada
Friday, November 1, 2013 - Part YA-2509
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
Tuesday, October 29, 2013 - Part YA-2509
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.

Sunday, October 27, 2013 - Part YA-2509
I have been waiting for this filter to be released (YA-2509). I have been buying K&N filters for years. Knowing the reputation K&N filters have, I knew this would be great for my motorcycle. Nice improvement on power and fuel mileage. Thank you K&N for all the wonderful great products you provide us with.

Paul H Grewe Jr.