Thanks for the warm welcomes.
The tires are the stock Bridgestone model (BT56?) so I assume they are original. The center of the rear is flat, at least 2 inches wide. I guess I could confirm by looking for a date code. I planned on buying new tires regardless.
I think they are the stock bars, narrow and pulled back. I'm planning on replacing the bars with something wider and maybe taller. Seems like Renthal bars are a popular upgrade. I'm not a fan of the bar end mirrors. I'd like to find OEM mirrors and bar ends.