Hi-I just repacked my Pro Circuit Pipe and used a supposedly better packing material from FMF (it has metal screen and several layers of stuff). It is supposed to last longer than the regular packing I have been using (also from FMF). The exhaust is quieter at idle now, but when riding the decel popping is bordering on obnoxious. I've checked for exhaust leaks and have none, so what else would cause this? Do I need to adjust jetting? It seems that a repack shouldn't make that much of a difference on air-fuel ratios. Also-unrelated but what are the symptoms of a worn chain and sprocket before it starts jumping teeth? I've got about 13,000 miles on the stock chain and sprockets and am starting to wonder if it is due for replacement. I have never had to adjust the chain, but it seems a bit louder and less smooth. The teeth on the rear are not perfect but don't have that crooked pointy look that really worn ones have. Does anyone know what brand of chain is sold by Procycle-I may order the chain and sprocket set they sell. Thanks for the help!