Thanks guys for all the help! Used brake klean, put everything back together, put NEW, actual motorcycle oil in (again), re-adjusted the clutch cable (somehow was thrown off by quite a bit, hehe)
took it for a spin, and it's SO MUCH BETTER. Lesson learned. Always always always make sure its oil specifically for motos.
Can you believe I actually did a ton of research on what oil to use before i bought that shell stuff?! haha, didn't help me much eh. I guess I missed the detail that it was all supposed to be motorcycle versions of each oil.
Anyway. I appreciate the help!