The Yamaha Road Star Warrior Forum

Ya, I feel dumb, but which hose is the crank vent hose?  I know it's on the rear cylinder, but there are two tubes that come off the top of the rear cylinder.  There is one directly on top and then there is one that comes out the side of the rear cylinder.  Can somebody post a pic for me?  I'm pretty sure I know which one it is, I just want to make 100% sure.  I'm still learning things about this bike, so forgive my ignorance.

 Thanks,  I appreciate it.

I recall its the one on top.  On a stock bike it runs from the top of the cylinder to the back of the silencer airbox.

Throttle side directly under the top right frame tube, it comes out of the valve cover & points at the rear of the bike.. In stock configuration it has a rubber hose about 1/2" OD that connects the fitting in the valve cover to the under tank air box.

http://images.powersportsnetwork.com/fiche/images/Yamaha/2005/Motorcycles/1723_cylinder.gif  

 Part #4 is the breather vent you seek.. (notice the direction of the engine in the pix)  Just like CHurchkey said.

Hope this helps!