| Author | Message | ||
     Dktechguy112 |
I am trying to decide weather to get a K&N air filter or stay with the stock one. My bike has the stock ecm, but i plan to get the ebr ecm this summer. Will the K&N work with my stock ecm? | ||
| Captain_america |
Idk but I'd stay away from the K&N. They are known as rock catchers... | ||
| Norwegian_1125cr |
Don't think the stock ECM will have any problems. Will not give any hp-gain over stock, but can be washed and used again and again... | ||
| Daggar |
I've been running the K&N on a stock ECM since the filter came out. No problems. | ||
| Lastonetherebuys |
A properly maintained K&N or similar oil type filter will filter as well if not better then a pleated paper filter. I put a K&N filter in about 3000km ago. Didn't notice any power gain or loss but the throttle responce feels smoother. (Message edited by lastonetherebuys on May 18, 2010) | ||
| Stirz007 |
I think elsewhere on BW, there are some other strings about this... As I recall, the stock filter is pretty low restriction and does a better job of actually filtering than the K&N. Some here complained that the K&N was letting too much dirt through, so changed back to stock with no loss in performance. I am currently running race ECM with stock filter and can't really see much difference from the K&N. The K&N may squeeze a little more ponies, so I run it on track days just cuz. | ||
| Fast1075 |
The oiled gause vs paper filter debate will never end. Take two identical engines with identical oil...put an oiled gause filter on one and a stock paper filter on the other....Run them both in dusty conditions for a few thousand miles....take oil samples and have them checked for silicates....see which filter wins... Ans sa Forrest Gump would say: Thats all I got to say about that...  | ||
| Stirz007 |
Fasto - gauze usually wins, BUT requires you to actually maintain it. Nowadays, most folks don't even know that. Paper filters cost less to make and require no maintenance. I'm just sayin that some others on here have complained about K&N being too dirty. Me - I run K&N when I know I'm going to clean it soon. Paper just runs until I get around to changing it. | ||
| 99buellx1 |
FWIW - The Erik Buell Racing bikes use the stock filter. | ||
| Mountainstorm |
I am not completely satisfied with how the K&N seals up to the airbox. The stock filter seems to have a stiffer flange and makes a good seal. I've found grit on the wrong side of the K&N when I overlooked a poor seal during one maintenance session. | ||
| Barker |
Danny Eslick won AMA championship with the stock filter. | ||
| Beeeeyuel |
Somewhere on Twin Motorcycles site I found an article with dyno graphs showing slightly more power using KN filter for both r and cr. Also I seem to recall it made the bikes run even leaner which is generally a bad thing. If you decide to do it - get the ECM fixed. Just my 2 cents. I've installed a KN filter and Dris's fuel map, and have yet to have a good day without rain to test it. | ||
| Easyrider |
Look here THE test where done in 2008 with THE k&n filter http://www.twinmotorcycles.nl/artikelen.asp?aid=53 you can also see what à k&n filter is doing with leaning out your ecm. | ||
| Tbowdre |
Wanna get rid of that stock filter you have laying around your garage? PM me! | ||
| Socoken |
As tough as it is for hot rodders to admit, the stock filter and exhaust are really tough to improve upon. Just a tribute to a great overall design. | ||
| Mountainstorm |
Agreed. Only lack I feel with the stock exhaust is when WOT. The HMF wound up faster. I doubt there is a SOTP Dyno reading on K&N vs Stock filter. Easyrider's graphs show that tuning for that extra bit of air will give you some top end. But without recalibrating the ECM I betcha it hurts not helps. | ||
| Carbonbigfoot |
BUT..... The K&N sounds cooler. Lets some of the intake noise out! R | ||
| Gofastalot99 |
A K&N simply does NOT filter better than paper. It has the capability to flow 6 CFM per square inch on average versus paper which typically can flow up to 5 CPM/sq in. but its filtering efficiency is lower than paper/cellulose. Most manufacturers now-a-days design the filter to be a little larger than necessary and it would take a long period of neglect to allow the filter to get plugged enough to cause a performance reduction. If a new/clean paper air filter does not allow enough airflow into the engine due to the size of the filter and/or additional air requirements caused by modifications to the engine, then replacement of the filter with a K&N will provide increased performance. If the engine requires less air than the airflow allowed by the paper/cellulose air filter then replacement of the filter by a K&N will show zero, or basically negligible, gain. K&N filters do have their place and I have them on two vehicles, but I did it because I made major engine modifications and needed/wanted more airflow. On a stock or nearly stock vehicle, which I have three, I run an Amsoil EaA for superior filtration. On my Buell I'm running the stock filter and will likely continue even after the Erik Buell Racing ECM and an exhaust. There have been at least two tests of K&N filtering that I know of, plus I've done a lot of Used Oil Analysis (UOA) and the K&N simply passes more dirt/silicon/contaminants than paper filters. I once owned a Cadillac STS that I sold to a friend - it had over 150,000 miles on it and it used a K&N since the first AF change. The car was later sold to another party with over 175,000 miles on it. The engine was still running. Obviously, the K&N will not kill an engine just because a little more dirt gets through, but to say it filters better than paper is not true, even if K&N says so. | ||
| 1_mike |
IF....you always have the engine at or above 10,000rpm...then the K&N may help. For normal people that would like some amount of keeping the dirt OUT...of the engine...stay with the OEM air cleaner. Mike | ||
| Father_of_an_era |
The only difference I noticed is that with the K&N the noise factor from the motor was decreased. I did not notice any performance gains of any sort. | ||
| Drward |
Concerning the K & N air filters. I have an 1125r and a Uly XT and ride them around the Big Bear Lake area in Ca, altitude 6500 to 8500 ft. Would the K & N's or any other after market air filters help the air flow a little? Dana Ward |
