I have looked this up and found many differing opinions on what sizes to go to.

I was wondering if anyone could tell me what sizes of MAIN, MID and PILOT jet to put in on a 2004 GS500F with a stock pipe and K & N drop in filter.

I think stock sizes are 130 MAIN, 60 MID and 17.5 PILOT correct?

Also, should I put a M4 washer under the needle or does the 04 already have a shimmed needle?

Thanks

From searching:

http://www.angelfire.com/mt2/mikesgs500/rejetting/Rejetting_Matrix.html

I'm running 137.5 mains, 62.5 mid-mains, #20 pilots, and three turns out on the mixture screw. It runs fantastic.

Quote from: AlphaFire X5From searching:

http://www.angelfire.com/mt2/mikesgs500/rejetting/Rejetting_Matrix.html

I'm running 137.5 mains, 62.5 mid-mains, #20 pilots, and three turns out on the mixture screw. It runs fantastic.

did you do anything with your needles? or just replaced jets?

Just replaced the jets. I'm gonna get it dynoed next Saturday I think. We can check the air/fuel mix then.

Search for "2004 Wileyco".  I have my sizes and a dyno run for stock airbox, Wileyco.  All I changed was the main up one size.