Quick question... "drain tube"?

[quietguy_imp]

I happened to notice, when taking a riding break this morning, two tubes hanging just behind the side stand. One's black and open at the end, the second is a clear tube with a secured cap.

What are these?

Sorry for my dumb questions, guys...

 

[the Ferret]

Emissions drain tubes to the best of my knowledge. tHere is another one up under the throttle bodies, short and L shaped. tHe clear ones are made to accumulate emmisions vapors which turn into fluids, and are supposed to be drained upon occassion when you see something in there. The black one I am not sure about but suspect it's some kind of breathing tube due to the slash cut

 

[quietguy_imp]

Ahhh, okay.. makes sense.

I remember reading in the owners book about the one in front of the throttle bodies.

I was kind of thinking the black one could possibly be an overflow outlet for the fuel tank. I know when I've refueled my bike, it's very easy to all of a sudden have the fuel level begin rising fast towards the filler opening. Mine's not had anything run out of it... yet

Thanks.

 

[flynrider]

I think the black (open) tube is a drain for the evap canister. The clear (capped) tube is a drain for the airbox. Due to the crankcase ventilation system, oil and moisture can collect in the airbox so it needs a drain. I generally uncap and drain it during oil changes.

 

[quietguy_imp]

I see... thanks.