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  #1  
Old 11-25-2019, 11:06 AM
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jetmechmarty jetmechmarty is offline
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XS1100SG which pilot jets



Which one of these pilot jets is correct for my bike? I've been getting terrible fuel economy for some time and I'm running out of ideas. How do I get the correct pilot jets?
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  #2  
Old 11-25-2019, 12:35 PM
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I should be the one on the left but also those in the pic have 8 air bleed holes in the sides. The correct ones only have 6. A 2-1-2-1 setup.
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Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.

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80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

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  #3  
Old 11-25-2019, 01:48 PM
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Quote:
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I should be the one on the left but also those in the pic have 8 air bleed holes in the sides. The correct ones only have 6. A 2-1-2-1 setup.
That's what I have. 6 holes. 42.5 slow 110 mains. 30 mpg at best. Pulling my hair out.
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Old 11-25-2019, 04:02 PM
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What do your plugs look like?

I continuously get mid to high 20s with mine unless I ride at 55 - 60 MPH. I've gotten up to about 42 MPG at those speeds. My plugs look perfect so I've jus accepted it.
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Greg

Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.

― Albert Einstein

80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

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  #5  
Old 11-25-2019, 04:19 PM
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Quote:
Originally Posted by BA80 View Post
What do your plugs look like?
Black. Follow me and you'll smell gasoline. Someone at VYR said I had the wrong slow jets. Beats me.
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Old 11-25-2019, 05:25 PM
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I dislike the late carbs with a passion. I had early carbs on okie even be for I swapped to the F engine.

Have you tried lowering your float levels? 1/2 mm .at a time and see if it gets better
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Greg

Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.

― Albert Einstein

80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

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  #7  
Old 11-25-2019, 06:49 PM
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jetmechmarty jetmechmarty is offline
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Quote:
Originally Posted by BA80 View Post
I dislike the late carbs with a passion. I had early carbs on okie even be for I swapped to the F engine.

Have you tried lowering your float levels? 1/2 mm .at a time and see if it gets better
I assume you mean lower the fuel level in the bowl? Or do you intend an increase to the level?

Also, these brass fittings. What are they and where do I get them?



Thanks for the help, Greg.
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Old 11-25-2019, 06:52 PM
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Yes, lower the fuel level. You should be able to get those fittings at just about any hardware store. Brass fittings in the plumbing dept.
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Greg

Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.

― Albert Einstein

80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

The list changes.
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  #9  
Old 11-25-2019, 06:59 PM
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One other thought, be sure the air bleed holes are clear in the emulsion tubes. If they are blocked, clogged ,you will run rich as well.

The air jets on the air cleaner side of the carbs too.
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Greg

Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.

― Albert Einstein

80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

The list changes.
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  #10  
Old 11-25-2019, 07:23 PM
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Done and done. Thanks!
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  #11  
Old 11-25-2019, 09:23 PM
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Marty, Greg IS correct by suggesting lowering the fuel bowl levels 1/2 a mm. Also, make sure all four fuel bowl levels are equal with engine at an idle. BTW, 1/2 a mm. equals .012 using a slide dial indicator for float level check.
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Last edited by motoman; 11-25-2019 at 09:27 PM.
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  #12  
Old 11-25-2019, 09:33 PM
motoman motoman is offline
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Quote:
Originally Posted by motoman View Post
Marty, Greg IS correct by suggesting lowering the fuel bowl levels 1/2 a mm. Also, make sure all four fuel bowl levels are equal with engine at an idle. BTW, 1/2 a mm. equals .012 using a slide dial indicator for float level check.
Any confusion correction: 1/2 mm of fuel level change IS equivalent to a .012 actual change of fuel bowl levels.
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  #13  
Old 11-26-2019, 04:36 AM
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Thanks Motoman. I'm going to make sure the correct needles are installed this evening. I'll have to put it away for a couple of days.

I should see 5GL16 with a magnifying glass?
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  #14  
Old 11-26-2019, 12:55 PM
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Quote:
Originally Posted by jetmechmarty View Post
Thanks Motoman. I'm going to make sure the correct needles are installed this evening. I'll have to put it away for a couple of days.

I should see 5GL16 with a magnifying glass?
Yeppers, have to use one myself in order to see that embossed designation on side of pilot jets near the top portion of jet.
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  #15  
Old 11-26-2019, 01:12 PM
motoman motoman is offline
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Apologize, meant metering rods, not pilot jets.
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