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  #1 (permalink)  
Old 07-08-2022, 12:20 AM
Club Chopper Member
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Join Date: Aug 2020
Location: Alpha, NJ
Bike Year, Make, Engine: 2006 Custom Chopper Ultima 113
Posts: 25
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Ultima 113/S&S Super G Starting Issues Pinned Down

Buying a Bike in a Container for 16 yrs can lead to a host of Starting Issues even if it only has 100 mi on the motor. As it was a one off of only three made in a new chopper shop which was to close unexpectedly not long after it had opened. Eliminating the Main power and Negative Ground wires and Installing 4Ga Cables and more of them got the Engine turning finally at satisfactory speed after numerous other Electrical problems were addressed. Running the Engine for the first time after killing two small replacement batteries (Softail with battery under Seat inside center of oil cooler) I was to begin a long list of Carburetor issues after the Super G was cleaned and reassembled. So after installing an inline filter I finally became aware of an issue that surfaced 2 times after running the motor+fan 20 min with no complaints. But it was to show itself at the next start at least a week later. With the air cleaner off and blipping the throttle twice then watching the squirt I would attempt to start and of course maybe a putt or short start would lead to failure. I now could blip the throttle and no squirt. With the fuel valve still open I could take out the fuel bowl drain plug and just a small amount of fuel would drip into the pan. Then removing the fuel line which is a 5/16 rubber hose with steel braiding that passes left to right under the tank and down along side the engine through air cleaner support and loops under carb and up to carb inlet. At no point does the hose come within and inch of the engine. Keep in mind the Engine had never quit during the running due to fuel starvation. So I removed the fuel line from the inlet with fuel valve open and holing the hose at the same height as it were mounted and looking down into the tip of the hose end about 1/4 in down is a head of fuel just sitting there, then it moved up ever so slightly. I watched this for about a min till it was starting to spill. Still watching an air bubble appeared then another. The fuel started to pick up a little speed but then slowed down almost to a halt when more bubbles came out and then a lot of bubbles came gushing out till finally it was clear fuel spilling at which time I reinstalled the hose, then started the engine. This occurred twice to me. So in my past as many of you may have corrected vapor lock by moving a rigid line away from a hot spot but if it in fact was vapor lock why didn't it starve the engine when it was running. Only after it cooled the bubbles formed? Has anyone had this same failure to start but not in a running situation. Can someone shed some light on this for me. This is the same line that went 100mi. I don't see replacing this hose is the fix.
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