whats up dudes. i just installed a k&n air filter, the SU-5589 make, on my 09' gs500f
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http://www.knfilters.com/instructions/SU-5589_inst.pdf

i have the air flow restrictor on. and i can feel the restriction when i goose it on the freeway.
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just wanted to know, if i need to get new jets on the carburetor or take the air restrictor off?
anyone have this installed and know a little bit of info on this? 
thanks,
-Josh

Here in West Seattle GS500 Club, we have come to the consensus that the K&N as a stock replacement is a waste.
Considering the time and materials to clean and recondition the filter, it is just easier to drop in a new paper filter. In the long run, it is less time, effort and cost.

You have to buy the stuff to clean them. Let them dry. The re-oil them. Frankly, we found that to be too much work and expense.

We now keep a few stock OEM filters on the shelf at all times. Take one out - drop one in. So simple.

At one time we though it was cool - a filter that lasts forever.... until we found the work involved to maintain one. For stock bikes, not worth it.

What was your reason for getting one?

Just thought it was a good filter

Hey hyper,

I had a stock 2004 and dropped in the k&n and noticed the same dead spot when opening her up on the freeway. So I took out the air restrictor and she ran great, albeit a bit lean, and she would overheat at full throttle in the hot days of summer.

So I rejected (see my signature for jet sizes) and the bike now runs great again without overheating. I dropped in the k&n mainly as an excuse to rejet, although honestly it runs just as good with a stock paper filter and stock jets.

Thanks for the info smoke. Do you have any recommendations for jet sizes on a 2009 gs500f

I referred to the rejetting matrix at http://wiki.gstwins.com/index.php?n=Upgrades.Rejetting

For your 2009, you can try the settings for 2001+, Stock Exhaust, K&N Dropin. Be advised that it is somewhat of a trial and error, so you may need to play around with different jetting sizes