1982 virago running issue.

here's the problem. the rear cylinder is working more than the front at idle off idle the front kicks back in. i know it's a carb issue. things i found. if i turn the rear cylinder throttle stop screw all the way down and turn the front up a little the front kicks in at idle. mostly the pop..pop.pop...pop.pop. not as smooth as the rear. i'm replacing the cracked intake boots this week. which i hope will fix some of this. i also installed a dynojet stage 1 kit. the bike has aftermarket pipes which are mostly open. here's my question. do i need a carb tear down cleaning and sync or just a good sync job? i lost my job on friday and well can't pay someone to work on it. i'd like to get it fixed myself so i can use the bike to drop off resumes.