I've noticed the bike is either squeaking or whistling at idle. I though it was an engine mount problem but it sounds more like it's coming from the motor itself. It goes away with any increase in throttle so I really have no idea what could possibly be the issue. Has anyone else experienced this? I searched this forum for whistle and squeak and didn't find anything so I'm guessing this isn't a prevalent issue.

 

Try hitting your top motor mount with some wd40 and see if that changes anything.
I found my left front mount collapsed and it put a bunch of pressure on the top mount which squeeked.
Not saying that is your problem but something to try.

 

This may not help you. But I noticed a whistling noise after I installed the HD heavy breather, but it has gone away after about 700 miles.

 

I am taking a wait and see approach. If it still does it by the time for the first service, I'll mention it then.

 

Hey did you ever figure out where it was coming from. My 17 SGS is doing the same exact thing and its driving me nuts. Can't seem to pin point it. Took the heat shields off the exhaust thinking they were the culprit but not the case...wtf

 

my buddy who also has a RK said he's noticed a hissing noise from the gas cap..mine doesn't, no idea if this could be what you're hearing or not tho..did hear a whistling noise the other night when I pulled into the garage, first time riding it in the rain, isolated it to the oil cooler fan, put my hand over the front of it and the noise stopped..weird, not sure what that's all about

 

No, I mentioned it to the dealership during the first service and they said they couldn't hear it even though I told them the engine had to be warmed up and running for awhile. Said they would lube the motor mounts but it didn't make a difference.

 

OK Thanks i was hoping you figured it out. i have 700 miles til my 1st service,if i don't find it by then i will see what the dealer says. Its really difficult to pin point its exact location, it sounds kinda like its sucking air from somewhere. i messed around with the air cleaner thinking it wasn't set properly but that didnt help. Maybe some kind of vacuum leak?Very frustrating, i have a trip planned to Washington DC for Memorial day weekend so if it dosent work itself out when i return i think im going to dig a little deeper and start taking my bike apart. Bike runs great,just driving me nuts!

 

Not the gas cap. im never that lucky, that would be to easy.

 

Another place to look for a source of a squeak is the rubber muffler mounts under the saddlebags.
Engine mounts, heat shields, or muffler mounts would be my guess...