I'm working on this project bike I got from my nephew. The airbox and carbs were shot with mouse ****, and it didn't coome apart easy. Now I am trying to get it to the point where I can try to fire it up and see what I got for an engine. On the intake side of the head it looks like the one in this picture. The fitting on intake #1 was broken off, so I replaced that. From reading online I can find it looks like the #1 line goes to the fuel tank petcock. Where does the nipple from intake #2 attach to?
Thanks! Any help would be appreciated. I can't find anything in the manual I dl'd or the clymer manual I have.

 

The pipe on intake #2 is blanked off by a closed rubber pipe during normal use. It is there for carb balancing, as are the screws on intakes #3 and #4.

 

Great Thanks!!

 

Was under the impression that the the nipple on the #2 was for the fuel tank petcock and the #1 was blocked off.

 

Either way round will work but vacuum pipe to #1 is standard.