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  #1  
Old 1 Week Ago
Tyler Lillie Tyler Lillie is offline
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Default Bendix carb accelerator jet plugged

I let my XLCH sit for a long time and recently worked to get some bugs out of it & get it started. I had drained the gas tank before letting it sit but did not drain the bowl on my Bendix carburetor (it did not have a drain plug). When I tried to get the bike started, the accelerator pump would not push any gas through the jet.

I removed the carb & soaked the bowl/jet in Berryman's B-9 chem dip for two days (my recollection is that I bought the chem dip in the mid-80s, so it is not the worthless reformulated carb cleaner). It did not remove the plug from the jet.

This has happened to me before and I wrecked the jet then by trying to use thin wire to clear the jet. That left me with a useless jet.

Has anyone else had this problem? If so, is there a solution to clear the jet? Does anyone know of a source to replace the jet (there is no Harley part number)?
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This might be helpful for a replacement...

http://www.jetsrus.com/
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Try boiling your fuel bowl for a few minutes in a pot of water and see if that loosens it up
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I live in Michigan so there is down time, I used to drain the carb but now I leave the tank full and the fuel on. In the spring the accelerator pump would not move fuel and I would remove the pump, oil the leather, and ta da I have fuel. Now by leaving fuel in the bowl the leather stays wet, and spring start-ups are easy. I do place a rag in the carb throat and pump the throttle to move some stagnant fuel through before the starting ritual. So maybe the orifice is not plugged. Just saying :}
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left field:
what is bad about the old aluminum carbs is bloom ( they call it bloom as in a flower opening up since the base metal oxidizes and swells shutting the port). NO carb cleaner will attack this, you need an acid base cleaner like aluma-brite, follow directions and as mr. doo suggested, heat is a good thing.
sometimes though, the carb becomes a paper weight since the ports are permanently damaged.
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Default

Your parts (aka the Benxdix bowl) should look something like the below pic. Correct ?

It might not be the nozzle (red circle) that is at fault but the check valve (yellow circle)..... or possibly BOTH.

Without seeing your Bendix carb, I might also try:
  • compressed air (in the reverse flow direction) to attempt to clear the nozzle, and then
  • a blow test (aka mouth on the accelerator pump cavity & a finger blocking the nozzle) to verify the proper check valve operation. If the check valve is mal-functioning, air (air in this test, gas in real life) will feed back into the carb bowl vs going out the nozzle.
Anyway, something you might look at.

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I’m willing to bet that the check ball has frozen shut the passage. The bloom corrosion may also respond to something as simple as lemon juice, but don’t leave it in there for too long at a time.
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Vinegar works great
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The Doctor71 wins the kewpie doll! Tried applying 90 pounds of compressed air to the jet orifice. I couldn't get a good seal because the orifice is on a round surface, but the jet appears to be cleared.

Thanks to everyone for your ideas!
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Quote:
Originally Posted by Tyler Lillie View Post
The Doctor71 wins the kewpie doll! Tried applying 90 pounds of compressed air to the jet orifice. I couldn't get a good seal because the orifice is on a round surface, but the jet appears to be cleared.
The Doctor71 got rep points for that.
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