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The idea for having a hose on the crank breather is that it sometimes spits oil out of the crankcase. This can happen if the bike has poor ring seal or if the bike is run super hard and the oil foams. When this happens, if there is no hose off the breather, the oil just spews out. If there is a hose, the spew is directed. The environmental cops want the spew to go up into your airbox (if that doesn't sound right nothing will). Same for the emissions system; the emission system will dump stuff into a runner just in front of the combustion chamber where it is super heated by the exhaust and hopefully burn... there is yet another hose from this system so that if something doesn't get burned in the manner described, guess where it is dumped? Your airbox. Yummy for the airfilter!

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Well, since the past owner of my bike removed the breather box I ended up putting a small wire mesh on the hose opening just to keep the boulders out. That should not get clotted up with any eminent oil burp.
Thanks for the information, I (as I'm sure everyone else following this thread) truly appreciate it.

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