Stock dirt bike. Lol. What planet are you from?
In all actuality, my bike is stock, engine and chassis wise. Seat, tank, guards, not so much. It's a 400, honestly, there's not a ton that needs to be done to it. Other than possibly rejetting it depending on how the plug looks, the only other upgrades i would consider would be possibly a stabilizer and oil cooler.
'10 Yamaha WR250R , '93 Yamaha TW200, '03 Honda Foreman 450ES 4x4.