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Main Area => General GS500 Discussion => Topic started by: GSF500 on March 28, 2013, 01:41:16 PM

Title: How to adjust the fuel screws??
Post by: GSF500 on March 28, 2013, 01:41:16 PM
Has anyone installed the longer fuel mixing screws? How do you adjust them for best performance after rejetting? If I turn the screws in 1 turn does that reduce the fuel flow and 1 turn out increase flow? What does screw turning direction produce? Mine are currently 2.5 turns out :2guns:
Title: Re: How to adjust the fuel screws??
Post by: bombsquad83 on March 28, 2013, 02:17:18 PM
Turning the screws out increases fuel in the mixture (richens).  2.5 to 3.5 turns out is usually the sweet spot.
Title: Re: How to adjust the fuel screws??
Post by: adidasguy on March 28, 2013, 02:50:38 PM
What he said. The longer screws work like regular except you can use your fingers instead of needing a screw driver.
FactoryPro makes ones for the newer carbs.
They made some for me for the older carbs (but no one here wants them so I have 7 extra sets on the bench  :sad: )
Title: Re: How to adjust the fuel screws??
Post by: GSF500 on March 28, 2013, 04:21:04 PM
Thanks for the fast response.....  :cheers:   
Title: Re: How to adjust the fuel screws??
Post by: oldmech on March 28, 2013, 04:34:04 PM
Quote from: adidasguy on March 28, 2013, 02:50:38 PM
What he said. The longer screws work like regular except you can use your fingers instead of needing a screw driver.
FactoryPro makes ones for the newer carbs.
They made some for me for the older carbs (but no one here wants them so I have 7 extra sets on the bench  :sad: )


if a 2000 year model falls in the "older" category i will take aset off your hands.
Title: Re: How to adjust the fuel screws??
Post by: weedahoe on March 28, 2013, 05:17:40 PM
Mine is an 07 and I have the lower screws. I turned mine in to seat them, then marked them with a black marker so when I turned them out I would know how much