My V7II Stone makes noies with the ignition off and the key removed. Definitely coming from inside the fuel tank. The noise is random (I've measured anywhere between 25 and 60 seconds between noises) and the noise only lasts about 1 second. It sounds like the fuel pump cycling on. Doesn't seem to cause any problems and it has been doing this since new so it doesn't bother me. It does it for several hours after a ride (I haven't timed how many hours but at least several). Thoughts, or is this the way they all do?