Originally Posted by
0ldhippie
Well I always like to have an end to the story so; Took it in, nothing bent. Replaced derailleur (tourney for Acera) and chain. Chain got messed up in sprocket when derailleur broke with me peddling (and motor pulling). Had to use a chain and a half to get proper length. Just too short a chain after front sprocket went up 4 teeth. Works much better in all gears now. Very smooth.
Thank you for the followup
This is a fair warning to everybody, that when you increase the size of either the largest rear sprocket, and/or the large chainring,
you have to reconfirm that the chain is long enough. This is especially true if the chain was originally measured by the big/big+1" method, which yields the minimum length chain for that combination, leaving no room for anything bigger.