I have a 2005 S40, and notice that one of my vacuum lines has come loose, and I can't find where it should connect. The line in question is on the right side of the carburetor, and is covered by a spring. I can't find any disconnected fittings anywhere. The fuel petcock line is connected.
Any info on how these vacuum lines run would be appreciated.

Thanks.

It goes up ti the back side of the petcock... ...

1/4" line (actually nearly 5/16") is the gas supply line.  goes from the bigger nipple on the petcock to the left side of the carb.

The vacuum line, about 3/16" (again a skosh bigger) goes from the smaller nipple on the petcock to the right side forward of the carb.

2 vent lines (also about 3/16" but no spring) on top of the carb, just point up into the frame.  In case you're flying upside down it'll keep gas out of your shorts.

And one more on cali models, about 1/8" comes from a catch tank under the swing arm.

lakegastonpack1 wrote on 01/03/11 at 20:55:19:


The petcock vacuum line connects to the nipple on the right side, closer to the bottom and the engine end of the carb. The upper nipple on the right side, and it's mirror nipple on the left side are vent lines for the float bowl. Those hoses connect to nothing. They just run up along the frame.

If you need to have the petcock on PRI in order to get gas, the two right side lines are flipped.

Just for future reference, here is a closeup photo showing where the carb's vacuum port is:





It is where the cut-off section of black hose is plugged into.  The front of the bike is to the right, in the photo.  You are looking at the starboard side of the carb.

Clear as mud?