Success! Just did my first ever valve adjustment! They were each uneven to each other and all a little tight. I was having cold start problems that were getting worse, to the point where I'd have to push start it when it was cold every time. But, BANG! A couple kicks after adjusting and it fired right up cold! Definitely a noticeable difference in responsiveness to the kick starter.
She idled pretty rough however, which required some carb re-tuning. Had to back out the front bottom screw (is that one called the pilot?) another half turn from "2-turns back" spec and turn the idle thumb screw up pretty much all the way. I don't currently have a throttle close cable (in the mail), so I'm using a homemade spring to keep counter tension. Set the idle with the thumb screw to about 1500-1800rpm (shes a little bouncy), then backed off the throttle cable a little. Note: if your idle goes up or down when you turn your bars, that means your idle setting it too low and your riding on cable tension.
Gonna take her out to the store now, she was a little stumbly around the neighborhood eariler, but I think the idle adj. did the trick.
Got my new petcock in! It's the cheapo-ebay one, looks decent, I'm just glad the fuel port is one solid piece with the body, the stock one has a fitting, which on mine leaks without some tape and a hose clamp. I already rebuilt the petcock hardware once before, which is good because the one I bought only comes with the gasket, but no hardware.
That's a project for another day, still waiting on my spark plug, throttle close cable, and 14t front sprocket (gonna try out the more torque-y gearing). Also, discovered I need a new clutch cable tonight, the casing is cracked down by the exhaust pipe. Ordering it tonight.
Magnetic drain plug is staying dry, no leaks, and fresh oil. It's coming along nicely. Happy!