Here ya go...

http://www.performanceintl.com/shop/products.cgi?comp=kn&make=SUZUKI&model=LS...

I bought mine from these guys earlier this year.  Looks like they've gone up a bit in price, but they were good to deal with.  Go ahead and pick up the recharger kit while you're at it as well.

Hope this helps you!

What is the actual improvement in performance (or other benefits) of upgrading from the stock to the K&N filter?

Can you actually notice it, or is it more about feeling good that you give your bike the best.

Thank you,



Martin

most all my combustion engines(san mower and edger)
have k&n air filters what sold me was my 97 tacomas' (2.4L  I-4) peformance when towing my 2500# camper trailer in the rockies..cant speak for the ls 650 cause did muff change and carb mods at same time.. i like the fact that they are reusable after cleaning and re oiling...too many things are use once and throw away...

I certainly don't want to "rain on anyones parade".  But the info you received is accurate.  Wetted gauze (think K&N style filter) will allow BIG airflow but also allows BIG dirt particles thru.  Standard paper elements trap small particles but also give small airflow.  The best air filter media currently is foam.  Why you might ask?  Because it allows as much airflow as wetted gauze, but because of its thickness, it will catch as much dirt as a paper pleated filter (and in some cases even smaller dirt particles because it filters better the dirtier it gets).

Quote:

Ditto!  I have been running the UNI foam pod filter # UP-4245 for a couple of years now and am very satisfied with it in all respects.  The filter has a 2 1/2 inch ID and is 4 inches long. I do not know if it will fit a stock carb; I am running an Edlebrock.

Two VERY important points to note from this test...
#1 the test was only conducted for 500 miles, most filters recommend changes at 7500-25000 miles.
#2 (related to #1) this test does not address dirt holding capacity of the filter media what-so-ever, which is a HUGE factor in the long term performance of a filter.  I know for a fact that foam and gauze filters will filter better as they get dirtier.
Also, if you look closely, 2 of the 3 foam filters flowed within 3% of the K&N filter, yet Bob said they only flowed "marginally better" than paper.  In reality, the Amsoil filter performed within 1.5%.  (Paper flow was within 7% of K&N flow.)

The problems with BOB's test are numerous (I, myself am an Astronautical engineer), but as I've seen even in my own circles, carelessness with test results can lead to drastically different conclusions.

Again, I don't want to "beat BOB up", but anyone ever notice that within 5 minutes after changing the oil in a diesel engine, the oil is black?  Does that mean it needs to be changed immediately?  No, the soot in diesel oil is smaller than 1 micron in size and no threat to the engine whatsoever, but looks pretty disturbing.  Point?  Without analysis of the size of the dirt particles, and test controls over which day was dustier and what kind of dust was encountered, further ?'s arise.

In the end, I agree with SavageRob.  Do some research and decide for yourself.  My own experience and research have indicated to me, that over the life expectancy of an air filter, foam can't be beat.  On the other hand, I agree with Bob...when it comes time to clean the foam or gauze filter, a paper filter looks pretty appealing.  

One thing that has not been researched/tested to my knowledge is: what size dirt particles injested thru the intake cause the majority of engine wear.  (Extensive testing has been done in this area with engine oil, and the answer is 5-25 micron dirt particles account for 50% or more of the engine wear on an internal combustion engine.)

K&N filters, at least all of them I've seen and used, are oiled cotton gauze inside a steel mesh.  You clean and re-oil them at regular intervals.