As the cam chain stretches the CCT keeps tension on it. IT keeps it from stretching out and jumping gears. I just replaced mine tonight. It wasnt that hard but it takes a bit of patience. As I was test riding the damn thing backed out so make sure you have it nice and tight when you install it.
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"Maybe this world is another planet's Hell."
- Aldous Huxley (1894-1963)
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