It's your new leather pants sliding on the seat when you roll off the gas.
No idea. May be worth putting up on the post where you think the squeak may be coming from. I do have a story to tell though whiuch may make you laugh/make you think I'm a dickhead/etc/etc. I heard a rattle noise that pissed me off while riding. It would only happen at speeds above 50 kays or so. Checked everything out on the bike, nothing was loose. I'm thinking " fcuk me ... what's goin on" . On the next ride ( to work ) I heard it again, and then I realised what it was. The rattle I was hearing was actually the top button of my jacket flapping in the wind and hitting my helmet. OK SEQ crew, let the piss taking begin.
Flood water and dirt roads ? definitely check for dry wheel bearings.
Also if it belt chirp.... you said you didnt hear it on the country roads.... could that just be because you were on open roads - there were no median strips and concrete dividers everywhere to bounce the noise back into your ears?
I reckon if it is belt chirp you woudnt hear it near as much on open roads (especially that low down on a bike). My sporty does whine a little when backing off the throttle, but it seems to come from the air box as someone else mentioned.
Jesus.If you've broken a Sidchrome breaker bar,you've tried heat,and you can't use a rattle-gun,how the fark do the mechanics at the stealers get these suckers off ?
may be not the belt but the pully out of wack , or possibly worn , ???????