Rims? Tail light lense?
You are correct the sticktion only sets in when the seat stays move. I think you have an assembly problem with thePTFE. When you fit the friction liner you have to wedge the casting open to apply the tape to the surface so you can get the tape to stick and then fit the drums without disturbing the tape, I still think a polymeric ring is better than the tape,. i think this has been discussed before, anyway it would be interesting to try . i always stuck the friction material to the alloy with rapid setting araldite, wedged the casting open and squeezed in the drums and allowed it to harden.Doing things to Vincents is always an interesting exercise what ever you do. However most of my riding was done with a fully sprung rear end and Pettiford springs with a Koni damper , front and rear.linear response to movement
Is that right Ken? I think that is only when it has started moving. It is the 'sticktion' before movement which tends to spoil things. PTFE is available with an abraded and acid etched face on one side so that adhesives can be applied. That would be my choice if I was to go down this route.
You have (or rather your bike does ! ) some interesting deviations....In 95 NZ Rally my hydraulic damper failed in North island and managed to buy a Koni and fitted it in the cattle market prior to John Britten giving us his interesting talk.
Don't like to deviate too far from standard.