Trying to quiet down my engine as much as possible. The kit is a "80"cc Gofastboy kit. So far i've done the cardboard in the cover mod, the rubber in the fins mod, and tried to pack the muffler. Now most of my noise is engine noise. When i disassembled the muffler, the "guts" wouldn't budge. All i could remove was the cap and a 8" rod that is welded to it. The stud in the middle is attached to some stuff inside, but won't come out. I packed the muffler loosely with muffler packing glass. The exhaust didn't quiet down at all. Any help with reducing noise would be great.