PROBLEMS AFTER SNORKEL INSTALL/// HELP PLEASE

bike ran like a champ before i installed in. followed instructions fron rincon650 and everything went together just fine. the bike starts, i cover the snorkel and the bike dies. i go to drive it and at part throttle or wide open she runs like ****. spits and sputters. i pull the choke and it made no difference at all. it seems its worse at part throttle. before the install i had a jet kit put in and the settings were-- 165 jet, and the needle set on the 3rd clip, and 2 1/2 turns out.

please help, i'm trying to go out this weekend