I have a problem that happens sometimes when I shift into the smaller rear cogs. The lateral vibrations from jumping down to the smaller cog sometimes causes the chain at the front chain ring to catch the tips of the ring and makes it ways between the front chain ring and the chain guard ring. The chain ends up jammed in between them so I have to pry them back out sometimes.
The chain doesn't fall inward because I have a chain guard there too. If the outer chain guard wasn't there, the chain would simply fall off. Any ideas on how to fix it?
I tried taking some links out of the chain to increase the chain tension but that didn't seem to make a difference.
Here's a picutre...