I've fitted a new 7 speed drive chain to a friend's bike (chainset, derailleur, freewheel, chain) It's one of those ones with a 14-34 freewheel and a derailleur with big jockey wheels. I can't seem to be able to index the fecker and am having real trouble getting the front gears to shift smoothly or consistantly. In fact, it's driving me bloomin' mental.
The only explanation I can see is the chain. It's a cheapish one I got from one of the big online retailers and was marked up on the web as a 7-speed but when it arrived the box said it was a multi-speed chain but I had my doubts at the time. Any thoughts?
Edit: Come to think of it, I've probably answered my own question.