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YA-4001
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K&N YA-4001 Air Filter

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0 out of 5 stars   1 Customer Review
  • Designed to provide increased horsepower and acceleration
  • Specifically developed for Off-Road, Motocross, ATVs, UTVs and Side by Sides
  • Pleated cotton media provides a large filtration area offering low restriction, high-capacity and long service intervals
  • Multiple layers of woven cotton gauze media offers excellent filtration
  • Fits directly into OEM air box with application specific sealing bead ensuring a precise fit
  • No fuel management modifications are required to obtain increased performance
  • Washable & reusable, most are pre-oiled and ready to ride!
  • One Year Limited Warranty
The K&N YA-4001 Air Filter fits some Yamaha YFM250 Bear Tracker, Yamaha YFM250 Big Bear, Yamaha YFM250 Bruin, Yamaha YFM400 Big Bear, Yamaha YFM400 Big Bear 4x4, and Yamaha YFM400 Big Bear IRS 4x4 models. See vehicle applications link for details.
K&N off-road replacement air filters are ideal for extended use in dirty and dusty off-road riding and provide clean carburetion even at high altitude. Generally, no jet changes are required with just a K&N filter element. K&N replacement air filters are washable and reusable and provide high air-flow with excellent filtration.

[More Information on Off-Road Motorcycle and ATV Air Filters]

Product Specifications

Air Filter ShapeRound
Filter MaterialCotton Gauze
Filter Re-Oiling Amount0.49 oz (15 ml)
FlangesNone
Height5.875 in (149 mm)
Inner WireNo
Inside Diameter1.938 in (49 mm)
Outside Diameter3.938 in (100 mm)
Package Contents1 Air Filter, 1 K&N 1oz Sealing Grease
Package Quantity1
Product Box Height7.25 in (184 mm)
Product Box Length4.63 in (117 mm)
Product Box Width4.63 in (117 mm)
Product StyleRound Air Filter
Top Material/FinishNone
Top StyleRubber
Weight0.6 lb (0.3 kg)

K&N YA-4001 Air Filter Product Reviews

Monday, June 30, 2014 - Part YA-4001
I have been a fan of K&N products for over 40 years. I have put K&N air filters on every vehicle I have owned and they have worked superbly. Ordering from your website was quick and easy and the filter arrived within a few days. I will definitely order from you again.

Penelope Robinson
Rimrock, Arizona