I've been looking at airbox removal kits and they all include a crankcase breather. Is there a crankcase breather on the stock bike? Where the heck is it? Does it need to be inspected, cleaned or replaced? I've looked in my Haynes manual and can find nothing about it. I'm thinking it's maybe part of the original airbox since it needs to be replaced. Where does the breather go if the airbox is gone? Thanks.