Negative Vacuum line connection

[ztucker86]

Hey ya'll,
I know this may sound really moronic, but I don't remember what the negative vacuum line coming from the fuel tank connects to. I freely admit that I have NO idea what I'm doing, but I am learning. I just got finished rebuilding the carb, and now I believe I have a fuel problem because the bike won't run unless it's choked all the way, and then it doesn't want to run much past its idle. Any help would be much appreciated, and I am going to take the petcock apart here shortly, but I still need all the help I need. Thanks again everyone.

-Zach

[tkent02]

Vespa? Cushman? Some Suzuki?

[ztucker86]

Sorry, it's a 1979 Suzuki GS850

[tkent02]

So you have VM carburetors. Theres a nipple on the left side of the #3 carburetor. It looks just like the vent nipple on #2 and #4, but i's drilled differently inside, it is the vacuum source for the petcock.

[ztucker86]

Thanks a bunch. I'll definitely try that.

[ztucker86]

I do need some more clarification; when you say Carb #3, are you referring to the carb that is in the right-center position if you are looking towards the front of the bike?

[Agemax]

yes mate carbs are 1 2 3 + 4 from the left when sitting on the bike

[MisterCinders]

ztucker - add your bike to your signature.

[koolaid_kid]

BTW, negative vacuum == pressure

I'm just sayin'