banshee mann

hey.. i got a banshee right... it will not start... it runs.. ill pull start it runs Great. but i can kik it all day and it will not start??? any idiea? i replaced like everything.. new crank ,rebuild. plugs,plug wires. im thinking something with carbs?

i mean cold as in cold motor not outside..

hey,, i got a banshee and it will not start,but if it is worm it will start right up every time. the only way i can start it is if i put my hand over the air box hole(kick 3 times starts right up) i want to know what to do to fix it? i have mostly everything rebuilt except crabs..would it be a problem with my jetting? air intake? something i dont kno thanks