What am I supposed to do? I don't have the instructions since the bike came with it. How do you clean K&N filters?

 

you first need to have special k&n filter oil. all u do is rinse it from the in side out really good and let it air dry they put k&n filter oil up and down each pleat on the filter, let the oil soak in and check for any white spots and oil those white spots then shes all ready

 

It seems necessary to buy the K&N filter Oil but do I need the cleaning solution too? Or is there another product (maybe just water) to clean it?

 

Get the cleaning solution also,it works good or sometimes I use simple green diluted with water 50-50 mix.

 

I agree. Soak it with K&N cleaning solution, let it sit for 10-15 minutes. Take it to your sink, and use the hose sprayer on it from the inside out (very important), then, either let it dry in the sun, or put it in front of a fan. Make sure it is completely dry before adding the K&N filter oil (also very important). After you oil it, let it completely dry again before installing it in your quad.