I would like a detailed technical explaination when someone has time. I was at the Canadian Nationals yesterday and a bunch of fast Intermediates asked me if I wanted to go trail riding with them again (big fun keeping them in the same time zone, but I can always pull the age card). Would have loved to but the bike is in the shop until Wednesday. (have Visa, will ride) Anyway, they were asking what was wrong with my bike and I told them that I had packed the motor with water and grit since I was in a mud hole, stuck (about 7-8 inches deep) and repeatedly tried to start the bike. Big mistake,motor needs disassembled and cleaned a new rings). These guys (and one LOVELY lady) all have CRF's. They said that the Honda had a plug in it. Is this like a check valve or PCV valve or what. Does the Yamaha have anything in its hose? I notice on the Yamaha web-site this hose goes to a breather assembly on the YZF450 quad. And if you route it directly to the airbox without a tee, would unwanted oil be placed into the airbox, or is the amount so small to be a non-issue. Does anybody know why there are so many different ways to do the same function, and in your opinion, did Yamaha drop the ball on placing a free flowing hose to such a low and vulnerable location to do this function? Thanks for your time.