I've spent a considerable amount of time trying to diagnose a "chirping" noise of sorts that only happens:
-after the bike is hot
-during decell (throttle chopped)
-usually in 3-4-5 gear
-around 4000 rpms (not much above or below)
-on the right side, near the engine, quite low
I posted questions about this in the past and have tried many different fixes.
It seems I can make the noise stop when I pull my heel firmly back against the right header pipe. I've removed/reinstalled the pipes, loosened and retightened the heat shields, loosened and retightened the header bolts, and "pryed" the header pipe away from the crash bar that it was very close to touching. I even changed to the "Harley header gasket". It seemed to become less frequent at times, but is now back again. I believe it's gotta be related to the exhaust - especially since I can make it stop with my heel.
Any other things I can try to do to the right header pipe so it doesn't resonate? I'm thinking maybe loosening the connection at the header? or removing the header pipe and squeezing the end slightly to create a [U]very slight oval , or maybe creating some test "shims" to wedge into various areas hoping to stop the resonance, change back to the Kawi header gasket?, etc., etc..
Any other suggestions? This is very frustrating!