Bicycle Mechanics - Chain issue

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CO_Steve
01-30-09, 05:02 PM
Last fall I bought a Craigs List mountain bike for the parts. I rode it as is enough to know it worked great. I then bought a frame and moved all the parts over. I now have a problem. When in the middle chainring the chain sometimes doesn't release as it comes around to the bottom of the ring. After an inch or two of chain wraps up it all releases with a clunk.

ultraman6970
01-30-09, 05:07 PM
The FD is set in the wrong position. U have to re set the FD positions maybe because the cable was re-tensioned?
CO_Steve
01-30-09, 06:03 PM
The chain is not in contact with the FD at all when this happens.

JiveTurkey
01-30-09, 06:21 PM
Stiff link where the chain was rejoined? Though I'd think you'd have similar problems on all your chainrings and cogs.
fuzz2050
01-30-09, 06:28 PM
It sounds like the middle chainring is worn down enough that it doesn't release the chain properly. Look at the teeth on the middle chainring, and if they are shaped kinda like a sharks fin, it's time to replace it.
CO_Steve
01-30-09, 08:51 PM
Teeth look good but I did find a sort of tight link. Test tomorrow.
Mondoman
01-30-09, 09:03 PM
Yes, I think JT is right.