Ii have two sons who bought the new harleys cvo breakouts they both have around 6 thousand miles 1 son has never had a problem with his while the other has had his in the shop a lot for noise comming out the primary case they found a broken spring each time it has been in shop one shop put duel spring in it was ok for about 50 miles noise came back it has been in shop for 2 months they found a broken spring again said duelspring were to much but they shimmed some thing to align the chain whats up