Came back from the shop, $40 total. She's LOUD, I'm really wishing I would've gone with a few hundred thousand resonators, or a different style muffler, but I ended up with what they had. Listening to it last night, I heard a rather scary tapping from the 3rd and 4th (I believe?) cylinders, but I got in there, turned out the spark plugs had rattled themselves sort of loose, and I tightened them right back up. I keep meaning to do the valve gasket kit, and clean the engine up at the same time, but it's gotten really cold the last few days. Hopefully this weekend.
Hellooooooooo Fart can.