Iím following this thread with interest because my CalVin continues to have gear change trouble. When I bought it, it would get stuck in 3rd when it was hot. I took the box apart and reshimmed the shift drum. Now, it gets stuck in 2d when itís hot.
Iíve found no reference in any manual to this adjuster, or any explanation of how to set it.
I didnít note where the eccentric adjuster was when I took it apart. When I reassembled it, I put the adjuster at its midpoint and marked that point on the bolt and case.
If one flat CW improved shifting up, I may try one flat CCW and see if that helps shifting down. Did I mention what a PIA this bike has been?