yz rida Posted August 23, 2006 does a good air filter make much of a difference? and what is a good kind to buy? Share this post Link to post Share on other sites
kx_rider53 Posted August 23, 2006 I use twin air. I really didnt notice much over the stock filter. However, having a new filter does hold oil better and will keep your engine cleaner. Share this post Link to post Share on other sites
UpAllNight Posted August 23, 2006 The stock filter is fairly restrictive. On a YZ250 changing from the stock filter to the UNI filter was noticeable. And we had two new 06's side by side, one with a UNI and one with a stocker... it was noticable that the bike with the UNI was more powerful. On a 125 however, I am not sure if the 125 demands enough intake that the stock filter becomes an issue of restriction... But I wouldnt take any chances and I didnt on my wifes YZ125, before we even rode it I junked the stock filter. Share this post Link to post Share on other sites
yz rida Posted August 23, 2006 whould you notice on my 85? Share this post Link to post Share on other sites
UpAllNight Posted August 24, 2006 I dont know... Depends on the size of the fitler (which I dont know how big it is). The stock filters are junk anyway and dont last very long so you might as well get a good aftermarket filter and move on. Share this post Link to post Share on other sites
2fittyjeff Posted August 24, 2006 I wish I was a good enough rider to be able to tell the difference between filters Share this post Link to post Share on other sites
06yz Posted August 24, 2006 I like the UNI filters the best, for engine protection and cleaning. Share this post Link to post Share on other sites
UpAllNight Posted August 24, 2006 I wish I was a good enough rider to be able to tell the difference between filters It doesnt take a great rider to go WOT. When you have two identical bikes side by side, both are brand new, both have the same fuel but one performs better than the other. And the only difference is one has a stock filter and one has a UNI Share this post Link to post Share on other sites
pamatt Posted August 24, 2006 I have been using K&N for many years. They make a nice upgrade. If I can find my old dyno sheets I will post them. My bikes always made more power and increased throttle response with the K&N. I have also seen gains with Uni. Share this post Link to post Share on other sites
adrunkgerbil Posted August 24, 2006 It doesnt take a great rider to go WOT. When you have two identical bikes side by side, both are brand new, both have the same fuel but one performs better than the other. And the only difference is one has a stock filter and one has a UNI Did the two riders weight EXACTLY the same? Share this post Link to post Share on other sites
UpAllNight Posted August 24, 2006 You had to ask LoL. The two riders where both me and my brother which is actually my twin brother (handle on this board is ModMotoMan). Yes we do both weight about the same. But even then, just seat in the pants will tell you which one performed better, at least thats all it took us. We both rode both bikes and we both noticed it right off hand. The stock filter chokes the bikes top-end power and seems to also soften some of the overall thrust by just a small amount. Share this post Link to post Share on other sites
2fittyjeff Posted August 25, 2006 It doesnt take a great rider to go WOT. When you have two identical bikes side by side, both are brand new, both have the same fuel but one performs better than the other. And the only difference is one has a stock filter and one has a UNI OK I wish I had two brand new YZ250's to actually get two see If I could tell the difference. Share this post Link to post Share on other sites
IamKazam Posted August 25, 2006 I would stay away from kn for dirt. Share this post Link to post Share on other sites
rmz757 Posted August 25, 2006 i have a twin air and a no toil right now. i ripped my uni just a bit the last time i washed it, so it hit the trash can. I have been running twin air/ no toil filters forever and havent had any problems with them. Share this post Link to post Share on other sites