I am having a problem with my stock 28MM Micarb carburetor on my Bullet 500. My float bowl continues to overflow and fuel spills out of the overflow tube attached to the bottom of the float bowl.
Here are the steps I have taken to correct this:
- Thoroughly cleaned the carb with carb cleaner and compressed air several times
- Adjusted the float level numerous times, even once to an extreme to see if I could get the carb from over flowing
-replaced carb float, hinge pin, the needle valve and seat the control the fuel flow, and the carb gasket
None of the above changes have made a difference
I have rigged up a mock fuel system to work on the carb off the bike
I took a Nalgeene hydration pack bladder and hung in above my workbench. The tube the goes out of this is just big enough to slide the stock fuel line into. I did this then took the float bowl off the carb and set the carb on top of a small whiskey glass. This way I can watch fuel (water) come into the carb, the float rise and wait for the (fuel) water to stop. Here is what I am observing. Water will come in and the float will start to rise to a certain point then the water seems to stop rising, but if you watch closely and give it 30 seconds the water rises to the top of the glass.
Does anyone have a suggestion on what is causing this? It almost seems as if the fuel (or water in the test) that elevates the float is not applying enough pressure to close the needle valve.
I have had the carb on and off probably 20 times over the past two weekends with no success at all.
I am open to suggestions of if someone has a 28MM Micarb they want to sell me at a good price I would be willing to take it off their hands.