Some history is the front sproket wore out so i put a new sproket on. I did not change the rear or the chain. it began to make a bad wine on decel. I rode it like this about 150 miles. So i figured 2 new sprokets and a chain should fix the wineing noise. After swaping the noise became quieter and less frequent but still hapens. Anyone have this problem or have a idea what is making the noise. Thank you for some input.