GStwin.com GS500 Message Forum

Main Area => General GS500 Discussion => Topic started by: Lou on September 02, 2007, 03:46:20 AM

Title: What to do, after K&N airfilter
Post by: Lou on September 02, 2007, 03:46:20 AM
Hi guy's,

Sorry if I've posted this in the wrong area.

Just a question about putting in a K&N air filter.

My bike is a gs500f k4, I've just had a Staintune Shorty put on, and the next step is the air filter.  Now what do i need to do,  with the rejetting/carbs etc.
Could you please give me any help with this, so my bike is running like new again. :)
Or any advise with the do's and dont's.
Thanks Lou
I would add a photo, but do not have a clue how too!!! :laugh:
Title: Re: What to do, after K&N airfilter
Post by: ohgood on September 02, 2007, 04:20:28 AM
Try the search function up top. It works, not always the way you think it should, but it does.

There is a rejetting matrix, and you can get a really good idea there.

To post a picture, you need to host it somewhere (picasa, imagebucket, etc) and link to it with that button just above the  :laugh: symbol up there. you'll see how it works.

Enjoy !
Title: Re: What to do, after K&N airfilter
Post by: Lou on September 02, 2007, 04:43:31 AM
I should have explained better, sorry,
Do I really need to rejet, or is it recommended ?
Cheers Lou
Title: Re: What to do, after K&N airfilter
Post by: dgyver on September 02, 2007, 06:15:23 AM
Look over the rejet matrix here to get close to your setup:

http://cgi.stanford.edu/~sanjayd/gs500/Upgrades/Rejetting

If you are running stock jets, you will be lean and need to rejet.
Title: Re: What to do, after K&N airfilter
Post by: galahs on September 02, 2007, 06:24:15 AM
Here's a clue

20 - 65 - 145

:thumb:
Title: Re: What to do, after K&N airfilter
Post by: Lou on September 02, 2007, 11:53:15 PM
Thanks for that, I've read over that,
just another question about in the poor mans rejetting,
it states in one section "

"This filter, K&N SU-5589, replaces the stock air filter and drops into the stock air box. It can be used with a restrictor, to avoid the need for a rejet, or without. "

What does it mean by the restrictor? :oops:

I will be using this model air filter

Thanks Lou
Title: Re: What to do, after K&N airfilter
Post by: spc on September 02, 2007, 11:57:24 PM
It'll be a rubber ring that fits into the mouth of the filter.  If you have an aftermarket exhaust, you already have a dire need for a rejet.  So go ahead and check out the rejet matrix for a drop-in K&N and an aftermarket slip-on and just ditch the restrictor when you get it. :thumb:  Do both the filter and rejet at the same time though, and try to do them soon if you are riding the bike :thumb:
Title: Re: What to do, after K&N airfilter
Post by: Suzuk-E on September 03, 2007, 01:19:18 AM
Quote from: spcterry on September 02, 2007, 11:57:24 PM
It'll be a rubber ring that fits into the mouth of the filter.  If you have an aftermarket exhaust, you already have a dire need for a rejet.  So go ahead and check out the rejet matrix for a drop-in K&N and an aftermarket slip-on and just ditch the restrictor when you get it. :thumb:  Do both the filter and rejet at the same time though, and try to do them soon if you are riding the bike :thumb:

just curios...why should they be done at the same time?
Title: Re: What to do, after K&N airfilter
Post by: dgyver on September 03, 2007, 04:33:46 AM
Adding a free flow exhaust and/or a high flow air filter will make the bike run even leaner than as it is already is from stock. Rejetting at the same time will prevent potential engine damage.