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Just got a barn find 1972 Elan 250 stored for 31 years. the return line for the carb has no place to enter the tank? There is only one tube access and the return line had been plugged and set aside? Looks like most tanks on line have a double access point into the tank for both lines? Any thoughts would be appreciated.
 

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No return lines, just vent lines. I think the 1972 Elan vented through the gas cap, so you wouldn't even have that. The carb will have vent lines as well
 

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Discussion Starter #3
YES THERE IS ONLY ONE GAS LINE GOING INTO THE TANK HOW ERVER THE CARB STILL HAS AND OUTLET FOR THE RETURN?
 

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Most of the carbs did not have a return line. They had a vent line that terminated higher than the engine (sometimes on the handlebars, sometimes above the gas tank). Some vent lines also may terminate in the air box. But those return lines are all vapor lines and not fuel return. They should never have liquid fuel in them. The main purpose of the vents is to allow proper operation of the float inside the float chamber, which is a non-pressurized chamber. If you are getting fuel out of the vent (vapor) lines, it's probably caused by the inlet needle/seat not sealing and the fuel pump is overfueling the float chamber.
 
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