Project Can 'O Worms

[Motorious]

Well the parts fiche at Bike Bandit.com shows the valve as consisting of three parts: an oil seal, a plate, and a compression spring (parts # 20, 21, and 22 respectively):


Although there is no hose shown attached to the valve, it makes sense that there should be one for as you can see there is a hole in the center of the seal, and that you'd simply push up on the hose to drain the water from the airbox.

Guess these things were designed for some serious mud-bogging, which becomes obvious when you see the commercials for 'em back in the day:http://www.youtube.com/watch?v=7K9zsiJMK68

[Vealmonkey]

I don't know if they were designed for serious mud bogging or not, but yamaha figured people would be going through mud and water and they needed a way to drain the water from the bottom of the airbox. And if you would see what the inside of some peoples' airboxes look like? They will clean their filter, but they won't clean the inside of their airbox. I don't know?