"chirping noise" What is it?

[Jimmytee]

+1
My scoot shifts so smooth I wounder sometimes if it is really an automatic trans and I'm just going through the motions of changing gears to feel good.
As far as any "Chirping" nope....none...natha out of my F6B, just what I'd conceder normal sounds only.

+1 When I'm riding it hard and pushing it, sometimes shift down fast and in the gas during switchback maneuvers and the rear wheel chirps, but not a hint of clunk from my transmission. I wonder if there are some machining tolerance differences during production?

[Steve 0080]

IMHO to get clean shifts run the RPM's up to about 4K and shift to the next gear. Mine as well is like butter but if your new to this bike and have shifted at 2K in the past one may not be in the power band and making smooth shifts. Also changing foot wear can cause an issue until one is used to them as well.