Strange noise

[Rane]

Greetings:

I know I can't be the only one with this issue. After getting home and shutting off the engineI heard some intermittent 3- second sound resembling a faint horn coming from the engine area. Is this a major issue? I'm hoping it's nothing requiring attention.

[Rambozo]

The cooling system venting pressure can make noises.

[Rane]

Ok. Maybe I'll flush it one of these days.

[gford]

Flushing won't stop the sound you are hearing, it is the gas cap relieving pressure from the tank. The next time you hear it loosen of the fuel gap and you should hear a whoosh of air. The thing is operating as designed.

[Rane]

I get that flushing won't stop the noise. I know it hasn't been done in at least 2 years and just talking about the cooling system makes me think I should. Chronic procrastination interferes. But yeah I'll experiment with the cap when I get home tonight.

[gford]

It will be fine when you get home. The pressure inside the tank is when you stop after riding and the tank has pressure inside it. The next time you hear it remove the gas cap and you will hear the pressure release.

Good idea to flush the coolant if you don't know when it was flushed last.

[Rane]

Welp, I got home and heard nothing. I did fill it up earlier. Although I'm familiar with the pressure coming from opening the fuel cap I never heard the noise. Thanks to everyone here with the helpful information! I'll have plenty more questions in the future.

[Rane]

Final Update (I promise): So I flushed coolant over the weekend, and while draining I heard that noise holding that same note. Now I know what's what as I check off maintenance items.

[Jonbarking3]

Remove your gas cap and soak in Seafoam for about 3 days.
Shake it and clean it out.
Soak it again to remove any and all dirt and junk.

That's what I did to get rid of that whine ( horn ) noise in gas tank area