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450 carb issue... Bogging & fuel venting out vent tube

  • Thread starter Thread starter Dave_A
  • Start date Start date
D

Dave_A

Guest
On my 450, I have started to notice a carb problem...

The bike will start to bog & simultaniously dump fuel out the vent tube of one carb (not both) - dumps as in a steady flow. Adding choke corrects this, but that's nbviously not the solution...

Any ideas?
 
If it is dumping fuel out of the vent The carbs are flooding Check the float valve in the carb
 
The tube you describe is the overflow tube under the carb. As SqDancer said, check your float needle valve. It's a valve that the tab on the floats pushes against. You may have some dirt or rust particles interfering with its ability to seat. It could also develop a small burr on its side and it's hanging up. It may also simply be worn and needs replacing.
If you have a short screwdriver you can remove just the carb bowl and service it.
 
I would take them off and give them a good cleaning, especially the float needle area and check the float level.
 
When I had that problem it was a leaking float. Take it off and make sure there's no liquid sloshing around in there.
 
Float needle seat was loose (on 80-82 450s, they SCREW into place, instead of press-in like the bigger GSes & 83+ 450s)...

FIXED.
 
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