Second fuel line into fuel tank

[steved]

I've been trying to find out what the second line into my fuel tank does. I have heard it refered to as the 'vacuum line'? Any enlightenment would be appreciated.

[Gazzar]

I've been trying to find out what the second line into my fuel tank does. I have heard it refered to as the 'vacuum line'? Any enlightenment would be appreciated.

If it is the vacuum line as the motor picks up REVs the vacuum opens the fuel flow up by opening the diaphragm in the fuel tap.On the old GPX250 i had if the vacuum pipe came off the tap the motor would not REV


Gary

[jonbuoy]

Yup stops fuel coming from the tank and flooding carbs and engine when the engines not running - like the old fuel tap. Don't forget to connect it if you take your tank off....