I've got this vac line (see attached pic) that comes from behind the cage thing near the front carb on the right side, where it is tee'd off of another vac line. one end is not attached anything but i don't know where to put it but i hear it sucking. any thoughts??

 

Picture doesn't show me jack squat. Semi scientific wild *** guess? Maybe PO Teed the line off the front manifold to ease carb sync. In any case, find out where it is supposed to go or plug it.

 

some more pics

 

OK. Looks like too fat a hose to be the front manifold vacuum line. One of those fatter hoses connects to a "T" but I can't remember what it is. Maybe somebody with a better memory will post.

 

Could be vacuum sensing line for the PAIR valve. Has the PAIR been removed? It sends air to both cylinder heads near the exhaust outlet. If there is no 3/4" diameter hose going to front cyl to the right of the spark plug, behind the wheel, the PAIR has been removed.

Just plug the vacuum hose you mentioned with a small screw.

 

Should be obvious once you pull the airbox off. It's time to change the air filter anyways isnt it?

 

That's exactly what it is.

 

i have taken the air box out, but i don't know what the pair things are. any advise on how to tell if it's/they've been removed? how is it obvious by looking? and i have a new filter