Aftermarket sprocket noise

[Richard Lanouette]

After replacing my sprocket by an aftermarket one. I had that "signing" sound that
what varying with speed. It felt like the chain was too tight but it wasn't. It
was 2 days before I left for 2 weeks vacation wit the GTS. By the time I got back,
the sound wasn't there anymore. So I wouldn't worry much about it.

Richard