05 FZ1 fuel & air mix adjustment

Ive noticed a rich exhaust smell coming from my bike and I wanted to know how to adjust the fuel air mixture on the carbs. I bougth the bike used. The previous owner installed a Dale Walker Performance kit Stage 1 which I think consists of a timing advancer, bigger jets, and exhaust. The bike runs great for having 98,000 miles.In my opinion, I feel like the bike gets too much fuel and not enough air based on performance and the obvious rich odor of fuel coming from my exhaust....can anyone help me with this... maybe im missing something
 
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