Harley Fuel Elbow Replacement

The stock Harley fuel elbow found on CV carburetors has long been known to be the achilles heel of this carb. The inlet is not only restrictive but made of plastic which breaks easily.

The plastic fuel inlet can crack and leak when removing the original crimp clamp or if over tightened. Also the manner in which the plastic elbow is formed onto a brass insert restricts flow.

If you have ever wanted to replace the fuel inlet and increase flow to your CV carburetor read on.

In order to remove the original fuel inlet you must first break off the plastic molded elbow. Don't be shy, get out your favorite hammer or pliers and simply snap the plastic portion off of the carb. It is important to note the angle/position of the original elbow so the fuel line is routed correctly.

Once the plastic is removed only the brass inner portion of the elbow will remain. Some have had luck pulling this piece out with vise grips and brute stength, but more often than not this only results in the brass piece spining endlessly. Below is listed the tools and technique for pulling the fuel elbow insert with ease.

Tools required: Electric or cordless drill Wrench or pliers 1/4"-20 thread tap 13/64" drill bit (optional, may be included with tap) 1/4" x 3" long machine screw 1/4"-20 nut 1-1/4" fender washer (min 1/4" ID hole) 3/8" x 2" pipe nipple	Fuel elbow removal tools
Start by securing the carb or clamping down to a bench. Drilling into the brass piece is optional but makes tapping with the thread tap easier. Using the 13/64 bit, drill into the existing hole approximately 1/4" deep using caution not to drill too deep. You may prefer to drill at an upward angle into the insert so that the brass filings fall out rather than back into the fuel passage. After drilling shake any loose shavings out. Be sure to wear eye protection. Using a 1/4"-20 tap and T-handle to run threads into the brass inlet stub.	Drill and tap brass stub
Assemble the puller. Place the pipe nipple over the brass stub. Thread the nut onto the 3" screw up to the screw head, then pass through the fender washer. Insert the screw/nut/washer assembly through the pipe nipple and thread a few turns into the tapped brass piece. You only need to thread enough to grab. With a wrench begin to turn the nut down (clockwise) forcing the screw to lift the brass piece out. It may be easier to hold the screw at the same time with a srewdriver. Once the piece begins to move it will pull out like butter.	Pull the old fuel inlet stub
Remove the pipe nipple, it may be wedged onto the carburetor. Thoroughly clean the fuel insert passage to make sure it is free of any brass filings. Soapy water will wash away any fine particles and not harm the internal parts. Be sure the carburetor is clean and dry. Installing the new fuel elbow will vary depending upon brand or type. Harley dealers sell both an OEM and solid inlet that can be pressed in. Some catalogs carry an OEM replacement inlet but it has the same plastic elbow (not recommended). Harley Performance recommends the CVP Fuel Max Inlet made from a single piece of brass which also improves flow by more than 40%.
Installing the new inlet elbow If installing a solid brass or CVP inlet and a press is not available simply tap the inlet into the carburetor with a mallet. You may also place a piece of wood over the elbow and tap in with a regular hammer. The smooth end presses into the carb and the barbed end is meant to grip the fuel hose. The brass inlet will self-seal when it is pressed in as long as the carburetor inlet passage is free of debris and not damaged or cracked. Some prefer to place a thin layer of blue locktite around the fitting to help seal.
Note that while working on the carburetor or any fuel system, care should be taken to keep away from any open flame or heat source. NEVER try to loosen carburetor parts using heat. Replacing the Harley fuel elbow can help guarantee a leak free carburetor, and if installing a hi-flow or CVP Fuel Max Inlet provide increased flow. Enjoy the Ride!

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