[jimshorts]

I went for a short ride today. I parked in the garage, and while I was fiddling with some other stuff, my '09 650 (1,200 miles) made an odd sound. I would describe it as a moaning/whining/whistling sound. It lasted about two seconds. Then, five minutes later, I heard it again. I waited a few minutes, then jostled the bike, and it did it again!

I looked through the search threads, and found a post about the same thing, and some riders said it was a gas vent valve, farting vapors.

Is that indeed what I'm hearing? The tank is about 3/4 full, and it's 80 degrees. The scoot runs fine. But if I remove the gas cap, let it burp, then remove it again five minutes later, I get another burp. Is this normal for the 650? Should it be building pressure in the gas tank so quickly?

 

[MJR]

Sounds like the gas vent noise, completely normal. Here is CA we have a carbon cannister and ours do not make that noise. Better to vent than the alternative.

 

[Buffalo]

Yes that is likely what you are hearing and it is normal.

 

[Rustydust]

Dang, but I wish my bike made a moaning sound. I wouldn't mind hearing one in my garage because I sure don't hear any in my bedroom anymore.

 

[NormanB]

Oft referred to as the Burgman 'fart'.

We all do it apparently.

 

[CaptKen]

I guess some fart more than others. I never heard my 07 pass gass but my 08 does it all the time. Even in stop and go traffic, I can hear it venting.

 

[jimshorts]

Thanks for the info--I'm glad it's a normal occurrence. But I have to ask--why? I've never owned a bike, or car, that held pressure and made farty sounds like the Burgman.

 

[bikerdoc]

As others have replied, normal mode of operation. C'mon people, nothing to see here, move a long, move a long...

 

[CaptKen]

Aw Geesh, we can really have fun with this topic. Come on, pull my brake handle.