dirty carb?

Thanks, this carb is new only 8 months old. No o2 feedback, just an 1982 asin style jap carb with nice big site glass, fuel is right at line. I'm now looking at a possible egr issue. Maybe that thing is not working or getting stuck open causing a huge leanout/vacuum leak? Sunday I'll bypass egr and plug all ports eccept vacuum advance. We'll see what happens. Main jets unscrew from outside carb so it should not be difficult to pop them and shoot carb cleaner into the wells/jet passages..