Aux fuel tank connection to main tank

[freewheelinfrank]

Has anyone on this forum plumbed a gravity flow fuel line into the main tank on their C650GT?

 

[francisthepig]

Also curious on this topic.

 

[freewheelinfrank]

I guess I may be the first, once I get around to trying it. I might have to tee into the injector return line if I can find it.

 

[cpallenjr]

A common method of plumbing aux tanks is through the tank vent line.

 

[freewheelinfrank]

where is the tank vent line located, I only see the one hose coming out of the pump cover?
Is it lower down by the filler?