Originally Posted by sofaspudKTM
There are a TON of articles on the benefits of K&N filters. Like the most popular and winningest filter in the Baja 500 and 1000 races.
I wasnt stating on opinion-was stating the FACTS of my personal tests on a dirt bike.
It is fine if YOU dont like them but apparently a LOT of people do. I will go with the AFE Intake on mine because I like the air box style the use.
A lot of racers rebuild their motors after every race or two, so they are not worried about wear and tear on valves, cylinders, and rings.
Most street racers trade or destroy their motors before 50k miles where the poor filtration effects are first starting to be noticed.
I would never purchase a used vehicle that ran K&N air filters unless I was also planning some top end work or a rebuild.
Sometimes you are lucky and never experience a dusty environment, so you don't need a filter in that case just something to keep the mice out of the intake manifold
K&N has a wonderful effective marketing group, thats where about 50% of the filter manufacturing cost goes. Have to pay all those dweebs to post K&N love on forums.
Nothink wrong with using them if you want.