Yz450f Backfiring on decel

My 2007 yz450f has randomly started backfiring alot on decel. I rode it in the morning and it was going fine went back out later that day and it just started popping. Works perfectly in acceleration.

thanks anyway mate i cleaned the jets out and dropped the fuel out put some new shit in and it works fine. I dont know which of the 2 it was but its fixed now and thats all that matters

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