I want to get a new after market air filter for my 2001 plaris trail blazer but i don't know which one to get. If i get the k&n i am going to get the outer wear with it but i don't know which one is better. I ride on really dusty trails and some water. thanks for any information you can give.

 

The K&N passes small dust particles and the 2 stage foam catches it all. I live in texas and we have a fine sand almost like dust

where I live and I noticed that when I took the K&N off dust was u
nder the filter. Switched to a 2 stage foam and I am much happier.

 

I run K&N,but the foam is better

 

blaerboy,

The K&N will pass more air, so if performance is what you're after go with the K&N. The foam filters will generally stop more dirt, but flow a lot less air than either the K&N or the stock paper filter. If it's any help, I run a K&N on both quads I own and my Ford Bronco.

 

Mike Chero,

Well i want more power out of my 250 but i have a problem now with rebuilding the top end, I have rebuilt it 4 times and it is only like a year old. The first 3 times i took it to the dealer because it was still under warranty but it took for ever. The 3rd time i took it to them they took 2 months untill i got it back. So the 4th time it messed up it was still under warranty but i decided to try it myself and it took me a week and a half and that was waiting for parts to order. So i want to try a different filter so maybe it will help me so I won't have to rebuild it as much. I have heard it is from dirt getting in through the filter and then in the engine. So I heard that I should get the uni filter and it shouldn't let any dirt in the carb. So before i made a descion i figured ask you guys to see what you think.

 

blaerboy,

If you don't mind me asking, what was wrong with it? I just rebuilt a motor on an older Trailblazer and it had piston knocking sounds. It seem the guy who bored it left a wee bit too much piston skirt clearance (piston skirt clearance is .0011" to .0022&quot. The best thing to do would be to bore it to the EXACT size of the bottom of the piston, then hone the skirt clearance. I mean you're only talking 1 to 2 thousands of an inch. Abrasive bore honing will take that off easily. Also, take the time and effort to install a Swaintech coated Wiseco piston. Rick Ritter of RCR should have them. The are worth their weight in gold.

I've been running a K&N in my Sport and Trailblazer since I've had them. I've had no problems with failure to filter. In fact the Trailblazer is still on it's original bore. I haven't put one yet on the kids 250EX. I feel that a washable foam filter is the way to go on it, as I don't want them to modify the machine for more speed.

Because of the design of the airfilter on the Trailblazer, you will more likely need an innerwear on the filter if you are in really wet conditions. The stock prefilter should be lubed with a good foam filter oil. This will take care of the vast majority of dust coming into the motor and the K&N will take care of the rest.

Hope this helped!

 

I like the K&N myself. It makes a big differance on my 700.

 

Mike Chero,

Well it lost compression and it wouldn't crank. I tore it down and the rings were bad in it. The piston also had a lot of carbon build up on it so I also purchased a new piston. it is bored 40/over and when i rebuilt it last time there was no wear done to the cylinder wall. So i just bought everything i needed to rebuild the top end all of the parts like a piston and rings etc. And i bought all my gaskets and when i got it back together it fired up on the first pull so i knew i done a good job at rebuilding the engine. And it has lasted for a month now and i want a different filter so it won't mess up so fast again.

 

blaerboy,

You must have not had the machine broken in when you replaced the rings the last time. When the bore is new (not shiny) it will usually take some time to break the bore in to the new rings. Yours must not have been broken in or you wouldn't be getting any compression with the new rings. I've seen people try to put new rings in an old worn bore to "freshen up the motor". It won't work that way. Usually they have absolutely no compression in the cylinder to speak of. Honing is the only way to make sure that the rings will seat properly.

I stand by my assessment on the filters. It you ride in a lot of fine sand (kind of like confectioners or baker's sugar) you might be best served with a foam filter as Snoopy61 said. However if regular dust and dirt is all you have to worry about, get the K&N.

 

I agree with Mike also. I knoticed a little loss in power on mine and ran a compression test. Down about 20 lbs and when I took the cylinder off the base gasket had gone bad. Also had a little blow by on the piston. Everything elselooked good so I got a new gasket and a new set of rings. Ran a hone in the cylinder put itall back together and compression is goodonce again. If you ride in heavy sand run the K&N but like he said if it is almost like dust go with the two stage foam.

Ronnie