My '04 has started making a noise.
The best way I can describe it is a rattle, or a growl, or maybe a grinding sound? It's hard to label.
Here's a link to about a minute's worth of the sound, with the microphone held right up to the right side cowling, in front of the driver's right knee.
Sound file
The noise is NOT constant, although it's more noticeable when the bike is cold. That doesn't mean it goes away after warm-up, just that it's a lot less constant than you'll hear in this sound file.
The noise comes from the front-right side of the bike, from the rider's perspective.
About 10 seconds into the sound file, I increased the RPMs slightly and the noise goes away. Drop back to idle and it's right back.
I stopped by the local Yammy dealer this afternoon to see if anyone might recognize the clatter and say something like "Oh yeah...that's the cam chain!" or "Yep, that's the framistat." Y'know, something obvious. However, the Service Manager and two techs all three shook their heads without the slightest idea what the noise could be.
Interestingly, after sitting at idle in the dealer's parking lot long enough for the bike to heat up to "Fan On" mode, the clatter pretty much had gone away. The sound file I recorded is about 2 hours later.
If anyone has an idea what this low-idle grumble/grind/clatter might be, holler away, okay???
By the way, the audio file is Windows Media, if that matters to your system or browser.