helpmebanshee

my banshee which is a 01 first i got my bike this summer and it was fine and then just before winter one of the pistons stoped firing i was told that a needed i new coil i got that did not help so i thouht that i was because i was so cold i live i upstate ny so this may go and start her up and i ran find intill i turn the choke off then that same piston whoud stop firing i dorve for a secone like that and i would not olny itle push gas and wouls shut off some helped me clean out my carbs and we put back on and would not start ever .............. i need smoe help i need to ride her