If they are the two tubes that come out of the T's that sit between 1&2, and between 3&4, then they are the fuel overflow. They get routed down below the airbox to let any possible overflow of fuel go onto the ground instead of your hot exhaust. There should be one other 'vacuum' line that comes off the tube between carb 2 and the engine that goes to the fuel petcock. It is a safety that only opens the fuel flow when the engine is running.
On Wed, Jun 15, 2011 at 7:27 PM, Allen Thomas <althomas...@gmail.com> wrote: > Most likely they are atmospheric vents. > > Sent via BlackBerry by AT&T > ------------------------------ > *From: * Bryan McGee <mags1...@yahoo.com> > *Sender: * nighthawk_lovers@googlegroups.com > *Date: *Wed, 15 Jun 2011 15:31:37 -0700 (PDT) > *To: *<nighthawk_lovers@googlegroups.com> > *ReplyTo: * nighthawk_lovers@googlegroups.com > *Subject: *[Nighthawk Lovers] vacuum lines from carbs > > I have 84 650 nighthawk sc I'm rebuilding from boxs of parts and I'm > allmost done.I rebuilded the carbs but I don't know where the two vacuum > lines coming off the carbs go two can any one help I have a repair manuel > but no help in there...So any help would be great thanks Bryan... > > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To post to this group, send email to nighthawk_lovers@googlegroups.com. > To unsubscribe from this group, send email to > nighthawk_lovers+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/nighthawk_lovers?hl=en. > > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To post to this group, send email to nighthawk_lovers@googlegroups.com. > To unsubscribe from this group, send email to > nighthawk_lovers+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/nighthawk_lovers?hl=en. > -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to nighthawk_lovers@googlegroups.com. To unsubscribe from this group, send email to nighthawk_lovers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
