--- In TeamCatrike@yahoogroups.com, Bicycle Minden <bicycle.minden@...> wrote:
>
> I bought an Expedition about a year ago and have most of the bugs worked out
except for a persistant drivetrain problem.  The chain jumps on the rear
sprocket on several of the gears. 
>
Charles, I just got back from a long ride and fiddle session.....Tightened the
cable at the derailleur one click at a time rode a few miles, fiddled some
more...... I believe it's a compounded problem; First, when they assembled these
things they ran the cable around the steering tie rod which causes the cable to
kink and move at the slightest turn - I corrected that and ran it into the front
(between fabric layers) of the seat and straight back, readjusted the cable and
all was well for about 30 miles....Then it began the chattering again and I
began fiddling with the tension. I almost have it but I suspect there is a
deeper problem; Last time I had to fix that sort of problem, on a DF, it turned
out that the derailleur when aligned at some cogs was just a tiny tweak out of
parallel with the cluster gears and there was just enough lateral play in the
idler (not the tensioner) to cause some slop. Fixed it by upgrading that idler.
I would first check that.
This could end up being a similar problem. As to the Sram chain...So far I am
not particularly impressed.