Join Date: Aug 2010
Location: Elk Creek, Kentucky
My experience has been similar to the "they pass dirt" comments. I worked in a motorcycle shop for a while and we hated them due to the time required to clean and dry and reoil (and charged more labor time for them). But as a personal owner cleaning time meant less to me so I tried them in my Harley and Toyota. The Harley self oiled its filter (probably not by design) and did Ok in the filtration department. In my Toyota work truck (subject to lots of construction site dirt), the K&N obviously passed more dirt. I expiramented a little by letting the K&N get dirtier (in an attempt to trap more dust) and would wipe out my air box to see if dirt passage changed after the filter had been in service for a while....it did not.
In a nut shell, my opinion is K&N will flow a little better and I could feel it in both the bike and truck. They pass more fine dust, no matter how they are cleaned, oiled, or run longer. The cleaning regimine is a pain...but this is small since I clean oiled foam filters in my dirt bike and ATV all the time and keep clean spares.
For the strom, I just use OEM and run them a long time. Typically 15,000 to 20,000 miles. When removed they are full of dirt and bugs and the intake side of the air box is spotless.
Cost and/or flow rate was never in the equation for me. Only the air cleaning ability.
2007 Blue SuperVee 1000
2013 Grey Super Te'ne're' 1200
2002 White HD Road King Police (divorced)
2000 Red Honda XR 400r
2003 Green Honda Rincon 650 ATV
If it is not broken, it can still be fixed