I just got done cleaning the stock filter on my 01 6r. I noticed it was a foam filter which would seem to be as free flowing as you could get. Is the K&n filter worth the money? Is there really any performance increases? Any comments please. Thanks
Do not put a K&N filter in your ZX6R!!! I repeat, Do not put a K&N filter in your ZX6R!!! The ram air system on our bikes works perfect with stock filter. A good friend of mine replaced his stock filter on his 2000 ZX6R with a K&N filter and his bike suffered major problems in the summer. The problem is that the K&N filter allowed too much debris into his ram air system causing throttle reponse failure. I would replace the filter with a brand new stock filter.
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