When the motor enters rear cylinder shut down mode sitting at idle in hot weather (which is getting increasingly prevalent here in So. Florida) it emits a nasty squeak which sounds to be in sync with the motor turning. I have had exhaust squeaks before which were fixed by greasing the mounts under the saddlebags, this is not the issue here. I have read somewhere else on this site that there is some kind of valve which can squeak like this, perhaps that's the issue? I'm perplexed, is it worth bringing it to the dealer for a warranty issue? In a pack, the brother sitting next to me in traffic gets quite annoyed by this noise.