Tonight I made the dumb move of washing my quad at a local truck wash.(super high pressure). Well when I was finished I found a piece of clear tubing underneath. Its 1/4" diam and I think it was used as a breather hose as it still runs fine plus the tube is kind of dirty inside. This hose is about 18" long. Does anyone have any idea where it fell off from or where I can look at a breakdown on line?
Thanks

 

check the battery. it might be the vent hose for that.

 

Maybe - but its pretty long (maybe 18"). Does this sound correct?

 

I believe the one you are describing is from the carburetor. There is a phillips screw on the bottom of the float bowl used to drain the gas out of it. There is a nipple right below it where the tube nipple will be. The tube on mine is tie wrapped to the left vertical frame straight down and extends 2-3" below the bottom of the bike. If it is stiff it should be replaced.

Front and rear differentials have vents but they are 3/8" OD.

There is a short one for the gas tank that runs from just below the cap down the center of the steering pivot.

Totun