Engine dies at an idol

Hello again everyone
Sorry I haven't posted a picture of my motorcycle yet, I want to have it in full working order before I do that but anyways Yesterday I went to take my bike for a spin and the engine kept dying as soon as I dropped it down to an idle and today I went to fire it up and it wouldn't even start if someone could give me some advice I would really appreciate it

Get the carb fuel, a clean fuel filter, have you a spark, battery charged, ignition timing in spec?
Compression okay, valve clearance and timing in spec, fuses okay,
It could be everything, Please, independent of the bike status, upload some pics.

What have you done on your bike before your problem appear?