pilot jet is equal to how many screw turns?

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steve.emma

Member

Oct 21, 2002

285

0

• Feb 22, 2005

• #1

hi,
question about jetting....if i need to go leaner on my mixture screw but cant go any more out than 3 turns or the screw could vibrate out ,then i need a leaner pilot jet right? but my question is should i go 1 size leaner at a time in the pilot or 2 sizes? how many turns of the mixture screw is equal to a size leaner (or richer) in the pilot jet at idle?
thanks.

steve.

 

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biglou

• Feb 22, 2005

• #2

One size at a time if you can't dial it in with the air screw. :cool:

 

CaptainObvious

Formally known as RV6Junkie

Damn Yankees

LIFETIME SPONSOR

Jan 8, 2000

3,331

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• Feb 22, 2005

• #3

Lou is rght, one at a time.

If your air screw is down below 1/2 turn, go to a richer pilot (higher number). When you get beyond 3 turns go to the next leaner pilot.

 

marcusgunby

LIFETIME SPONSOR

Jan 9, 2000

6,450

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• Feb 22, 2005

• #4

If its miles out then try a jump fo 2 pilot jets sizes but for fine tuning one size.

Bikes like the 03 kx125 needed a drop from about a 42 to a 30 to get them to run nice.

 

steve125

LIFETIME SPONSOR

Oct 19, 2000

1,252

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• Feb 22, 2005

• #5

Generally. I find 1 pilot size change = 1/2 a turn on the air screw. It's ideal to have the pilot sized, so the AS is 1 1/2 out.

 

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steve.emma

Member

Oct 21, 2002

285

0

• Feb 23, 2005

• Thread starter
• #6

thanks for all the advice guys,thats just what i needed to know.
steve.