Nice classic cruiser, and welcome to MBc! Please take the time to post an introduction in the "Introduce Yourself" section, as we like to have all new members do that.
Cheers!
-Kilroy
The bike is a Huffy cruiser bought at Wal-Mart. It originally had fenders and white wall tires. The engine kit (55cc) was purchased from Simpson motorbikes. I bought the muffler used from a local scooter dealer. I think it might be for a pocket bike, but I’m not sure. I hacked the original muffler off and attached a pipe to extend towards the back and attached the new muffler. I think it’s quiet as or quieter than the original. It definitely has more power. It did run lean with the new pipe even on the richest setting. So I put a few small washers under the c-clip to raise the needle and it was good to go.