Did it ever do this before, or is this a new chain/freewheel?
I assume the chain isn't sagging when you get on the 13 toother. If the derailer still has some wrap capacity on the small cog, the chain isn't too long.
Check for a chipped tooth on the 13, or a stiff link. Perhaps a semi stiff link only kinks up when the chain has to wrap the small cog in the rear.
If no, check the chain line. Do the front chainrings center on the freewheel? If they're off, you may need to change the BB spindle.
Is the skipping only on the small chainring 13tooth combo, ie the "no-no" combo? If yes, how long are your chainstays? If around 16 inches or less, the frame may be too short to accomodate the small-small crossover.
Tom Adams, 40 miles today on my green International. No snakes seen.
-----Original Message----- From: Roadgiant@cs.com <Roadgiant@cs.com> To: classicrendezvous@bikelist.org <classicrendezvous@bikelist.org> Date: Saturday, March 17, 2001 4:07 PM Subject: [CR]chain skip
>hello my friends,
> I'm currently plaqued by a simple problem. The Fuji chain skips
under
>load on the 13 tooth rear cog. Is my chain too long? I've tried moving the
>axle back in the dropouts to no avail. When the chain is on the 52/26 combo
>the Suntour Cyclone pulley cage is at a 45 degree angle which is how I
>determined chain length to begin with.
> Any ideas?
>
> Scott "only 22 miles today" Smith
> LA -- where it is just perfect today