I recently noticed that a black residue from fuel vapor was coating the underside of my gas tank.  The clear, yellowish hose coming off the top of my engine has melted (as seen in attached file).  I've scoured the owner's and repair manual and the only thing I have come up with is that it is a rebreather hose, possibly a crankcase rebreather hose?.  I would like to order a new one but need to know what exactly it is that I need.  Any help would be great!!

the breather hose connects to the port seen below that yellow hose, which is too small to fit there.

because there's no hose on that port is why you got oil on the bottom of your tank.

Somebody plumbed the wrong size and type of tubing in the wrong spot.

The tubing is 10mm ID and is supposed to fit on the outside of the metal nipple.  The hose then goes under the frame and crosses to the left near the carb, then goes back and attaches to the front of the air box....if you still have one.  If you don't have the airbox, then you need to put a small filter on the end of the tubing.

I looked around at all the local auto stores and found nothing that was the correct size......then WD hooked me up with this company and I got what I needed (in black).
http://www.boostcontroller.com/index.php?item=248&ret=http%3A%2F%2Fwww.boostc...