Why would my bike be "choking"?

most likely it is just some dirt in the fuel supply. If you dont have fuel filter install one in your fuel line. Do not rely on the fine mesh screen in your fuel petcock. With glass filter you can at a glance see if fuel is getting to the carb. Here is a quick thing that might work.Only takes a few seconds to do this. Start the bike and then while riding,turn the fuel OFF. Just as the motor starts to choke out from the fuel being turned off turn the gas back on. Usually this can be enough to dislodge small particles of dirt in the fuel supply. If the problem persists then I would be looking into removing and cleaning the carb and installing a fuel filter. Every one of my bikes has a nice glass fuel filter so I have visible evidence of gas getting to my carb!

Sounds fuel related, possibly a clogged fuel tank cap vent or blockage somewhere in the system. When it chokes, it usually means it's struggling to get fuel, in which case it runs lean.

Possibles to check. Dirt or gunk in float. Pilot jet, float height. Ignition pick up maybe over heating. Pull the cover off the nose cone and see if it's starting to melt.

float height is usually a problem in cases of choking in my experience.

Check to make sure the vent for the gas tank cap is clear, and the tank is vented. When this condition, happens, pull over and remove the cap and put it back on. If everthing is fine, then that's it.

interior,exterior,any past dents or repair,battery ,tyres,no suspension sound,stat and run without jurks,and milometer to make sure how much did it serve.