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The specials have a little gizmo called an octopus that the petcocks run into. Inside the octopus is a little vacuum activated diaphram that starts and stops the flow of fuel. If that diaphram isn't working properly, it will allow gas to continue to flow to the carbs even when there is no vacuum present. If the needle and seats in your carbs aren't working properly you'll wind up with gas dribbling out of your carbs. The other thing that happens in this situation is the gas goes the other way as well - into the combustion chamber where it can leak past your rings and into the oil. This thins the oil out and can really cause problems, like a spun bearing if you run it with a load that way.
Lots of members simply get rid of the octopus and use the fuel taps for 'on' and 'off', or you can get rebuild kits for the octopus. It's easy enough to tell if the octopus is leaking. Pull the fuel line off between the octopus and the carbs. Turn the taps to 'on', and if fuel comes out of the line with no vacuum present it indicates that it isn't working properly.
Once you have the leak stopped, change the oil and filter so as to get rid of the contaminated stuff.
When you ordered your rebuild kits, did you verify that they were for a special? Also, in your personal profile it would be a good idea to list all the particulars for your machine - specifically modifications. Aftermarket exhaust, drilled airbox, etc. can affect the jetting requirements. More information would be helpful.I think I have a loose screw behind the handlebars.
'79 XS11 Standard, Jardine 4/1, Dyna DC1-1 Coils, 145 mains, 45 pilots, plastic floats - 25.7mm, XV920 fuel valves, inline fuel filters, speed bleeders, Mikes XS pods, spade-type fuse block, fork brace, progressive fork springs/shocks, manual petcocks, 750 FD, Venture cam chain tensioner, SS brake linesComment
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I don't know if anything has been modified on the bike at all - I have no way of telling and just got it - the person I got it from didn't really know either.
I do plan on getting the oil changed out when I do the carbs, just in case stuff did leak into the oil. I guess when I get everything pulled apart to start working on the carbs, we'll find out if the octopus thingie is or isn't working either.1979 XS1100 SpecialComment
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First let me clear up that I do see your in Oklahoma and not in Marion Indiana, sorry for the confusion on your location.
As to the mods, if you look at your exhaust, is there a muffler on each side of the bike with two cylinders headers going into each one? That is a 4-2 exhaust system, if all four headers go into one collector and out one muffler on one side of the bike, that is a 4-1 exhaust. These bikes came stock with an "air box" which is usually a chrome thing sitting behind the carbs where your air filter lives. Some remove it and put individual filters on each carb, "POD" filters. Some also keep the air box but drill holes in the bottom to let it breath easier.
Those are typical mods you can visually identify. Also it is VERY helpful if you edit your signature to indicate what year and model your bike is. We all assume it is an XS1100, but is it a "standard" or a "Special" or even a "Midnight Special" which you probably stated back in a thread somewhere, but if it is in your signature we dont have to look back to find that info and it does make a difference as to what the answer would be on some items.Last edited by DGXSER; 03-16-2009, 11:33 AM.Life is what happens while your planning everything else!
When your work speaks for itself, don't interrupt.
81 XS1100 Special - Humpty Dumpty
80 XS1100 Special - Project Resurrection
Previously owned
93 GSX600F
80 XS1100 Special - Ruby
81 XS1100 Special
81 CB750 C
80 CB750 C
78 XS750Comment
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Wolfy - When you look at the exhaust, take a look underneath and see if there is a cross-over (pipe connecting the left and right sides). If you've got 4/2 with the cross-over it's stock. If you have 4/2 without the cross-over it's aftermarket. Makes a difference when computing your jetting requirements. Also, if you take the bottom of the airbox off, look in and see if there are any holes drilled inside the 'ring' created by the filter element - also affects jetting. Some have drilled their airboxes outside the 'ring', which is improper and results in unfiltered air going into the carbs. It's bass-ackwards from the way you would think it works.
Pictures are always helpful if you have a digital camera. To add pictures you need to setup an account on photobucket (or something similar). Photobucket works great and it's free. You upload the pictures to photobucket, and then link to picture using the "insert image" icon in your message.Last edited by dbeardslee; 03-16-2009, 12:10 PM.I think I have a loose screw behind the handlebars.
'79 XS11 Standard, Jardine 4/1, Dyna DC1-1 Coils, 145 mains, 45 pilots, plastic floats - 25.7mm, XV920 fuel valves, inline fuel filters, speed bleeders, Mikes XS pods, spade-type fuse block, fork brace, progressive fork springs/shocks, manual petcocks, 750 FD, Venture cam chain tensioner, SS brake linesComment
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It is showing, I just need to get my readin specs out I suppose. Or lay off the caffiene for today!!Life is what happens while your planning everything else!
When your work speaks for itself, don't interrupt.
81 XS1100 Special - Humpty Dumpty
80 XS1100 Special - Project Resurrection
Previously owned
93 GSX600F
80 XS1100 Special - Ruby
81 XS1100 Special
81 CB750 C
80 CB750 C
78 XS750Comment
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2-79 XS1100 SF
2-78 XS1100 E Best bike Ever
80 XS 1100 SG Big bore kit but not fully running yet.
Couple of more parts bikes of which 2 more will live!Comment
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I didn't look for a crossover when I was there but I do believe that it is an aftermarket exhaust, a nice one at that. The bike was running well prior to his accident. I think that the problem with the carbs started after he installed the "new" tank. Seems to me that he may have had some junk in the tank that fouled the carbs and caused a float to start sticking. Hopefully the carb kits get here this week and we can get you back on the road.
Ivan,
Beer, BBQ, and wrenching on a bike sound like an excellent time. Hope you can make it up.Harry
The voices in my head are giving me the silent treatment.
'79 Standard
'82 XJ1100
'84 FJ1100
Acta Non VerbaComment
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i hope I can make it as well. They just found a softball size cyst in my wife. I may be spending the weekend at the bedside keeping vigil over her.
Of course the doctor says it will be an out patient surgery, but on something the size of a softball? dont sound right to me.Ich habe dich nicht gefragt.Comment
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Probably will be, it is an Ovarian I assume?
MY sister had one of those when she was about 16 YO. Doctors kept telling her to come clean that she was pregnant. She kept telling them if it is they can name him Jesus and change her name to Mary. After about two or three months of this, they finally did a scan. Wound up pulling out an ovarian cyst the size of a basketball. Literally took two of em with both hands on it to pull it out..30 lbs. That was NOT outpatient surgery. Interesting thing was, they told her she would never have kids....My nephew is now 11 years old.Life is what happens while your planning everything else!
When your work speaks for itself, don't interrupt.
81 XS1100 Special - Humpty Dumpty
80 XS1100 Special - Project Resurrection
Previously owned
93 GSX600F
80 XS1100 Special - Ruby
81 XS1100 Special
81 CB750 C
80 CB750 C
78 XS750Comment
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my best hopes for your wife's full and speedy recovery.
Don't sweat the outpatient thing, surgical techniques are getting better.
In the 1960s my first wife had a gallstone operation. 2 weeks in hospital and a scar you'd be proud of if you'd gotten it in a bar fight.
In 2001 my second wife also had a gallstone operation. 2 days in hospital and a scar you can hardly see.Fred Hill, S'toon
XS11SG with Spirit of America sidecar
"The Flying Pumpkin"Comment
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Latex ...
we must brothers from a different mother cuz .....
Eat the elephant one bite at a time.......80G Mini-bagger
VM33 Smooth bores, Pods, 4/1 Supertrapp, SS brake lines, fork brace
Past XS11s
79F Stone stocker and former daily driver, sold May '10 now converting for N.O. to cafe style
79SF eventually dismantled for parts
79F Bought almost new in 80, sold for a house
79F The Ernie bike sold to a Navy dude summer 08
79SF Squared-off Special, Vetter/Bates tour pkg., Mikes XS coils, G rear fender and tail light. Sold June 09Comment
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