So it took me a long time to do, between all the other projects I had going, but I finally finished putting the bike back together after replacing the cam chain. There was some pretty bad wear inside the case from that thing.
Unfortunately, the bike is still noisy. It's pretty decent when the motor is cold, but once it's warmed up, it's still pretty noisy (albeit not as bad as before I did the chain).
I've properly tensioned the chain, and have checked/adjusted the valves (.003 and .004 with the motor stone cold). What else can I do?