[tripletango]

Strange sounds from the garage! Moaning sounds from the B 650. Went to dealer. They heard the wierd sounds.
Best guess the gas tank was very low. Residual engine heat caused vapors to expand and cause the noise through the vent.
My 650 whistled through wind shield and is now possessed.
Just in time for Halloween.
Any one else noticed this situation?

 

[roy_ryall]

Sticky fuel system pressure release valves. Mine used to only do it when the tank was below half full