K&N Engine Air Filter: High Performance, Premium, Powersport Air Filter: Compatible with 2009-2014 YAMAHA (YZF R1, YZF R1 LE) YA-1009

This a great up grade over stock. Plus it reusable. High quality.

Its working excellent

Ok if you have an 09r1 or newer this does wonders. I went to a track day the week before I got this air filter. I had my oem one in. If you have a jumpy throttle feel like it bogs in the turn as you try to power out then all of a sudden you are at 12 o'clock this fixes that and gives you confidence in your throttle again. I just went to a track day last weekend again with the k&n airfilter in and it was incredible. Like night and day and it feels good to be confident on your bike. Smooth throttle easy installPs-I felt like there was a slight power gain in the bottom end but it was smooth

I have been using K&N air filters in all my vehicles since they became available. They are well made, and just a great idea. They flow more air than the stock paper filter and have good filtration. I now use BMC air filters. They are said to have a higher filtration, with good air flow. Since my bike has forced air induction, filtration take priority over flow.

This filter fits like stock but increases power. Its the easiest to maintain as well. A quick rinse with the K&N washing detergent and let it dry. Apply a little filter oil to the pleated filter element and your ready to reinstall. That's it. It doesn't get any better than this. I also own the race version of this filter for track day riding and its unbelievable the amount of power increase you get from just a filter change. The K&N line of products for sport bikes is a must for the riding enthusiast. If this filter wasn't good for the life of the bike I would buy another one. That's how good it is.

Great product, easy to install and the good thing is I'll never have to buy another air filter again. I had K&N on my R6 until I sold it. I'm not feeling anything difference in horsepower but that could be because my bike is kind of running rough, which has nothing to do with the air filter. I would advice anyone with stock air filter to buy a K&N filter for their bikes.

My “factory filter” was plugged up pretty good when I went to do the tune up on my r1, I did the air box mod and installed this filter and it runs much better! And the fact that it’s cleanable is sweet so I never have to order and wait a week for a new filter!

Prefect fit for my 2011 R1 and a noticeable difference in performance.