Started engine, smoke started coming up from bottom of exhaust.

Actually i just read this. This could be it? I did change my oil to a synthetic blend.

"Another cause of the smoke could be that the oil originally in the engine was a mineral oil but was replaced with a synthetic oil, which has a greater cleaning effect on varnish and soot deposits. Once the deposits have been washed away, the tolerances in the top end of the motor can open up, giving the oil pathways it never had before with the varnish and soot deposits in place"

it seems more like its the left over oil from the exhaust burning off though. I just want to make sure my bike is not going to set on fire or blow up.

Oil has a tendency to get on the exhaust during oil changes, the only part of your bike that gets hot enough to burn oil is the headers/exhaust. I wouldn't worry about it.

Probably just some oil that dripped on the exhaust. No big deal. Let it run and it will stop smoking in a bit.

I wiped some of it off when my engine cooled, started it back up and no more smoke. Went riding not too long ago with fresh oil and fresh lubed chain.