Originally Posted by
3373jones
... the one problem is that sometimes the rear cassette would engage and sometimes it would not (i.e., i would spin the pedals but would not move...) does anyone know the problem? ...
If your NEW chain is jumping the cogs on the OLD freewheel,( and you have sized the new chain correctly) likely you need to replace the old freewheel as well.
It is a cheap and easy repair to do - likely you can get a suitable $11 freewheel from Niagara like this
http://www.niagaracycle.com/product_...oducts_id=5151 (and repack the rear wheel bearings while you are at it). If you don't have a tool to remove the old FW, your LBS might do it cheaply enough or even for free.