Question about Yamaha Motorcycles
Posted by Anonymous on
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.
YAMAHA XS1100 CARB REBUILDING
OEM parts for Yamaha
Yamaha 1979 XS1100E Owner Manual
Posted on Feb 01, 2017
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Posted on Jan 02, 2017
Get on the web and Google " motorcycle service manual yamaha "
Also try your local library. Often manuals are donated.
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Posted on Apr 01, 2009
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
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.
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.
Posted on Oct 05, 2009
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
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
Testimonial: "Haven't tried it yet but this was very helpful and will do what you instructed. Thank you"
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