air filter

I have been looking into getting the k&n air filter. I only do street riding. My question is would I need a pcv with just the air filter upgrade? Because I know that it is going to run leaner but do I really have to spend that much money for something that small? Also is it worth getting it...

This is what i took out of my Rc390 One stock KTM air intake. Witch i will note is one of the worst air intake systems i have ever seen. Pulling air from the back of the bike all the way to the front. And replaced it with a K&N Rc 9630. I used a 2.25 to 2.5 reducer to go from the intake to the...

Being anxious to give my new bike a 'steady diet of dirt' (like pretty much all the vehicles I had on the road the past 40-some years) I put a K&N 'Made in USA' air filter in it. When I loosened and removed the screws holding the gas tank cover on (the one on the right side from the location...