Well now, bike problems all fixed. One forum post and an answer later, the troubles are gone. Makes me feel a bit stupid, but hey, I'm learning. So the rattle, loose spark plug. Which caused the other issues involved with the engine. Clutch cable, didn't break, just popped the actuator assembly, got it back together now and working right. Now to adjust the clutch so it isn't slipping. Victory is mine. :D