'74 International - supposed to be rained in today, had a good miles week, scheduled ride was cancelled, so stayed in and took on this bike.
I don't get it, but I fixed it.
Ever since I replaced my Cyclone GT RD with a rebuilt piece (needed a new main spring -
https://thecabe.com/forum/threads/back-to-the-drawing-board.129977/ )
only on the smallest/fastest 12t cog, the chain skips several links. At first I though it was shifting down and tackled RD adjustments.
It works perfectly on the build stand, and only shows up on the road.
So I got the idea of putting it on the old Turbotrainer, squeezing the bike into a rear tire load and trying to duplicate it.
Viola - it proved my last theory, it's jumping the small cog on the chain quick-link.
This has cost me several sprints against John, since I can't spin with him missing my top two gears - but I can mash anybody.
Put in a new quick-link, reversed the orientation, just in case, and it's working like a champ under load. Can't explain it, but it works. Look out John, here I come.
and there I go