i've got a cheapy tandem bike. it has an idler sprocket that puts tension on the chain. anyway, it clicks really loud when we pedal. it has a full range of adjustments, up, down and side to side. i've adjusted it as best i can and its still pretty loud.
is there any way i can make it quieter? would a different sprocket of a different material be any quieter?
i should add that the bike is brand new. it has less than 10 miles on it. it's been too cold to really take it out.
here's what it's doing.