Question about Harley Davidson XL 1200 C Sportster Custom Motorcycles

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Need float specs fuel leeks out overflow on carb. hanging should it be right below the gasget at the toe or the seem?

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I would suspect that your problem is something other than the float setting. If your carb has been running properly until recently, there may be trash in the needle and seat. Float settings don't just change by themselves. Once they're set, they stay that way until someone changes it. I'd be glad to send you the float settings but you didn't tell me what kind of carb you're running on the bike. Harley riders are noted for changing the type of carburetor they run on their bike. If you're running the stock Keihin carb, the float level has to be set with the carb on an angle. To illustrate this, I'd have to send you a picture. I'd be glad to do so if you're contact me directly as this forum only allows a file size of 150Kb or smaller. Contact me at wd4ity@bellsouth.net and I'll send you a picture of how to set the float level of the Keihin CV. If you are running a different type of carb, let me know and I'll send you information on that one as well if I have it.

Good Luck
Steve

Posted on Mar 20, 2011

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1 Answer

Fuel leek from the carbs overflow


Hi, Neil 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.
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The floats hang down so far in the carb that they actually get stuck down even when the fuel flows in after a rebuild.

Turn the fuel on and tap the bowls with the handle of a screw driver (plastic) I used a long shaft screw driver that way you can pretty much get all of them from one side.

This light tapping jults the floats and it allows them to pop up with the pressure of the full bowls if helps with them moving.

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Hi, Anonymous and the usual suspects are:
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This is for an 1979 Honda CBX. I installed new float needles and seats. Also, I adjusted float levels to factory specs. All carbs are still flooding.


I PRESUME YOU THOROUGLY CLEANED THE FLOAT NEEDLE SEAT?AND INSPECTED THE NEEDLES FOR LIKENESS COMPARED TO THE OLD ONES, SOMETIMES YOU HAVE TO IGNORE THE FACTORY SETTINGS PLACE THE CARBS ON THE BENCH WITH A FUEL SUPPLY CONNECTED AND ADDJUST EACH FLOAT UNTILL THE LEVEL OF FUEL IS BELOW THE OVERFLOW TUBE ALLOWING ENOUGH ROOM FOR THE FLOATS SO THAT THE LEVEL STILL LYES BELOW THE TUBE WHEN FULLY ASSEMBLED, COMPLETE THIS TEST BEFORE FIXING THEM TO THE BIKE, WHEN YOU ARE HAPPY REPLACE THEM BACK ON THE BIKE,

PS IS THE NEEDLE SEAT AVAILIBLE SEPERATLY MAYBE WORTH INVESTING INSOME NEW 1S IF THEY DO

YOU COULD HAVE THE CARBS ULTRASONICALY CLEANED

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After starting the JD LX176(which starts right up) gas leeks out of the hose under the air filter. This has just happened after sitting for the winter. The gas was replaced with fresh fuel.


I dont know what type of engine you have, but you must remove the carburettor and dismantle it . The problem could be with the fuel inlet needle valve which could be dirty and sticking or it might be the float. Wash the carb. with a clean brush and fuel. Sometimes the float becomes perforated and fills with fuel and weighs it down, so the carb. will overflow. Try this, it`s the best i can do. Stephen.

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