I finally had a chance to ride my '82 Zilioli, all Campy SR, all original, EXCEPT for the chain. I put a 9sp chain on it a few years ago so I could ride it with my 9sp Velomax Tempest wheels instead of the original tubulars. The tubulars were in bad shape, or so I figured.

I put all the original components back on it, including the 6 speed tubulars, built with Campy hubs and Nisi Laser rims. The problem I had is that in the middle cogs the chain would slip. It wasn't engaging the cogs at all. This didn't happen in the top 2 or bottom 2, just the middle. Is this just due to the 9sp chain? Or are the cogs worn, or most likely both. I ride my other vintage bike with a 10sp cassette and chain (same Velomax wheels), and an old Zeus crank from the 6 speed era. No problems with that bike.

As for those tubulars, one is a Clement Criterium, the other is a slick of unknown origin, the label has faded beyond readability. Both are old but held up for a 15 mile ride. I didn't trust them on the downhills and took it easy although they did OK on the flats when I turned it up a bit. Maybe I'll buy some new ones, or more likely I won't ride it enough to bother.