The tube from the airbox is fine the way it is as long as you have the plug in the bottom of it so it doesn't suck up water. All I have ever vented is the front, rear, gas tank, & fan and have been fine. I think someone mentioned another one somewhere but I don't think its really necessary and I ride a LOT of water and no issues. Also wouldn't be a bad idea to snorkel if you ride water also. Never know when that deep hole will get ya lol.. Happened only once to me and I learned my lesson. Every machine from now on will be snorkeled.
