You might as well not even run a filter if your not going to oil it.
Your just letting dirt into your engine.
while the oil in Kerosene is better than no oil at all........I dont recommend it as a filter oil replacement.
Just use the proper oil and read your owners manual when it comes to service of a stock foam filter.
As for the K&N I ran one on my old Warrior and it worked great for me.

 

K&N is a sham, I would never run them on an off road vehicle. Sand wreacks havoc on the engine. Lont time riders and engine builders know oiled foam is the way to go!

 

Well my old Warrior is still running around here with over 10,000 miles on it (I installed a cateye mountain bike speedo on it)
I would think if your statement was true the motor in it would have been toast many miles ago.
The K&N is an oiled filter....unless you cant read instructions.

 

Well, after further evaluation, the air filters do have a light coat of oil on them after all. The idea of looking in the owners manual was a stroke of genius! It actually did tell me what type of oil to use and how to maintain it.

 

lol hello all [img]i/expressions/face-icon-small-smile.gif[/img] just wanted to say hiya to all and im Me < is ducking [img]i/expressions/face-icon-small-tongue.gif[/img]

 

Well, to add my 2 cents, and perhaps a little fuel to the fire, there are a few things that need to be addressed when using a K&N (some of which have already been addressed).

1) A K&N needs to be oiled with K&N filter oil. Believe it or not, many folk don't know this.

2) A K&N is made out of cotton (gauze), and should not be washed in hot water, nor should it be dried with an air hose as compressed air can and will create small holes in the filter.

3) A prefilter should be used for better protection, especially in wet or dusty conditions. The pre-filter also adds ease in cleaning especially in sandy conditions. Sand just falls off of the prefilter, leaving it clean for longer periods of time.

4) The rubber boot on a K&N WILL shrink over time, ESPECIALLY is washing the filter with hot water, thus they often need to be replaced after a few years of use, as they become too tight to fit over the stock boot. (a friend found out about this the hard way)

I have no experience with K&Ns other than riding at the dunes. I can say in MY experience, a properly oiled, maintained K&N has worked well at keeping debris out of my motors (Blaster, Banshees, 250Rs) for several years, but again, I keep my K&Ns well maintained, and ride only at the dunes.

Additionally, you must know that a modified motor will have a greater need for increased air flow which you might not see with a stock motor. Thus in some cases of motor modification, the K&N can provide better air flow than seen with a foam filter.

There is nothing wrong with a foam filter, and they generally provide plenty of flow, but I believe a properly maintained K&N filter is also capable of good service for a quad (at least in my experience of using them at the sand dunes).