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Fuel leaking thur carb on 79 yamaha xs 1100 - Yamaha Motorcycles

Posted by Anonymous on

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Hi, Anonymous and the usual suspects are:
1. Damaged or restricted fuel tank venting system.
2. Loose float bowl screws.
3. Damaged float bowl o-ring.
4. improper fuel level in the float bowl.
5. Worn or dirty inlet valve or seat.
6. Damaged or leaking float assembly.
7. Particle contamination in inlet fitting cavity.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
http://www.xs11.com/forum/showthread.php?t=26395
YAMAHA XS1100 CARB REBUILDING
http://www.ringler.us/xs1100/XS1100H-SH-LH_Service_Manual.pdf
OEM parts for Yamaha
Yamaha 1979 XS1100E Owner Manual

Posted on Feb 01, 2017

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Posted on Jan 02, 2017

  • 3567 Answers

SOURCE: looking for a manual for a 1979 Yamaha XS 1100.

Get on the web and Google " motorcycle service manual yamaha "
Also try your local library. Often manuals are donated.

Please rate this solution. Thanks!

Posted on Apr 01, 2009

  • 6 Answers

SOURCE: i have 79 YAMAHA XS1100. I had a problem with 2nd

sounds like the float in one or more carbs are stuck..you will hahe to remove the float bowls and check if the floats shut off the fuel supply..

Posted on Sep 25, 2009

  • 101 Answers

SOURCE: 1980 Yamaha XS 1100 Carduretor diagram

It is part of a detent mechanism for the choke. No, all 4 carbs do not have them, only 1.
Here is a link to Yamaha's website, where you can pull up a diagram of your bike's carbs. The ball is #10 and there is also a spring with it.
http://www.yamaha-motor.com/sport/parts/home.aspx
They are saying there are 2 balls and 2 springs, but I do not remember them having 2. I also don't see another #10 or #11 on the picture anywhere. You should be able to look at the rod that connects all the chokes together and see if there are 2 sets of dimples for the balls. Obviously there will be one set in carb #1, if you find another set of dimples for a detent ball, then there indeed would be 2. Also, the carb body would be drilled for the spring and ball like the #1 carb is.
Thanks
RSRBOB

Posted on Oct 05, 2009

  • 79 Answers

SOURCE: 02 yamaha vstar 1100, ran fine. started it the

Sounds like it may be drawing air around the intake somewhere. Let it idle and spray around carefully with wd-40 until it speeds up. This will reveal the leak.

Posted on Oct 11, 2009

  • 23 Answers

SOURCE: Have a 2001 Yamaha 1100, carbs are leaking, why?

Fuel over flow is normally caused by dirt getting into the fuel lines and blocking the valve in the float bowl. The reason that if wont fire is because there is too much fuel in the engine and it is flooding.

Turn the fuel off and remove the carb.

take off the float bowl and remove the float. held in by a bar.

check the valve and blast compressed air into the valve seat to clear any debris.

Rebuild the float bowl but do not put the case back on yet. a simple test to see if it has worked is to gently hold the float whilst blowing down the fuel line.
As you move the float up and down by hand it should be harder or easier to blow, resulting in a complete stop when you close the valve completely. (BE CAREFUL NOT TO APPLY TOO MUCH PRESSURE TO THE FLOAT BOWL)
as this could bend the float. Once happy with the operation of the float, replace the case and install back on the bike.

Please reply if this does not fix the problem.

Posted on Apr 06, 2010

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I have a 2005 Yamaha v star 1100 fuel comes out of over flow when you are at idle but running fine when you ride it it has new floats valves and cleaned carb.what next


Hi, Brian and the usual suspects are:
1. Damaged or restricted fuel tank venting system.
2. Loose float bowl screws.
3. Damaged float bowl o-ring.
4. improper fuel level in the float bowl.
5. Worn or dirty inlet valve or seat.
6. Damaged or leaking float assembly.
7. Particle contamination in inlet fitting cavity.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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I have a 1980 yamaha xs 1100 special, it sat in a garage for 3 years, i replaced the fuel lines, cleaned the tank, and replaced the plugs, how come it only idles when the choke is on and it sounds like a...


You probably have varnish build up in the carburetors, causing restricted air flow, and therefore the engine is running too lean, especially on the right side, and a lean running engine will run hot at the exhaust. It only idles when the choke is on because the choke creates a richer fuel supply. A can or two of commercial fuel cleaner through the fuel supply may get the engine's jet's orifices cleaned out. Otherwise, overhaul the carbs.
Hey, nice old bike, though. Good luck

May 20, 2011 | 1979 Yamaha XS 650 F

1 Answer

My yamahai xs 100 engine has developed a serious


Does it run and ride fine with the balance pipe disconnected?
Have you checked your ignition coils. If you have a manual, check which coils fire which cylinders. Does this tie up with the two cylinders that are getting hotter, (are the other to staying cool/cold?) each coil provides the spark for two cylinders. You can swap the coils and see if the other two pipes go blue, that way you know a set of coils is bad. It sound like you have done everything on the fuel side, which leaves mechanical or electrical. Dont forget to check/clean/change the simple things such as the spark plugs and caps.

Aug 02, 2010 | Yamaha XS 650 SE Motorcycles

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Gas leak when I lean my 78 xs 650 on kick stand. when i lean it upright gas comes out through air box.


your carb floats are sticking and allowing the fuel to continue to flow,have your carbs cleaned..

Dec 01, 2009 | 1979 Yamaha XS 650 SF

1 Answer

02 yamaha vstar 1100, ran fine. started it the


Sounds like it may be drawing air around the intake somewhere. Let it idle and spray around carefully with wd-40 until it speeds up. This will reveal the leak.

Oct 11, 2009 | 2002 Yamaha V Star 1100 Classic

1 Answer

1980 Yamaha XS 1100 Carduretor diagram


It is part of a detent mechanism for the choke. No, all 4 carbs do not have them, only 1.
Here is a link to Yamaha's website, where you can pull up a diagram of your bike's carbs. The ball is #10 and there is also a spring with it.
http://www.yamaha-motor.com/sport/parts/home.aspx
They are saying there are 2 balls and 2 springs, but I do not remember them having 2. I also don't see another #10 or #11 on the picture anywhere. You should be able to look at the rod that connects all the chokes together and see if there are 2 sets of dimples for the balls. Obviously there will be one set in carb #1, if you find another set of dimples for a detent ball, then there indeed would be 2. Also, the carb body would be drilled for the spring and ball like the #1 carb is.
Thanks
RSRBOB

Oct 02, 2009 | 1980 Yamaha XS 650 G

1 Answer

I have 79 YAMAHA XS1100. I had a problem with 2nd


sounds like the float in one or more carbs are stuck..you will hahe to remove the float bowls and check if the floats shut off the fuel supply..

Sep 05, 2009 | 1979 Yamaha XS 650 F

1 Answer

My '79 xs650 is popping thru the exhaust. It was fine last year except for leaking petcocks. I cleaned the taps and put new K&L kits in each side. Still have some trouble with leak thru to the carbs....


reset float levels and make sure that your needle and seat is not leaking and check that you have no air leaks on your inlet rubbers.

clean the carb properly and remove all fuel jets , needle jet and air screws before blowing out.

Jul 13, 2009 | 1979 Yamaha XS 650 SF

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