Yours goes rich huh? Mine goes lean. I am running two of the cheap Fram G-2 inline fuel filter. They are lasting about 70-100 miles before they both start filling up with junk from the fuel tank. something always gets past them. I can tell because I will be driving along at speed and when I let off the throttle to slow down, the exhaust will pop. I know, that should be an indication of rich, but pulling on the choke stops it. Anyway, when it pops while slowing down, it will not idle when I do stop. It also will not drive slow at all unless I apply full throttle. It still runs at speed perfect though. I just pull off the carb, replace both fuel filters, take the float bowl off, blow it out with air or B-12 Chemtool and put it back together again. I'm good until the crud builds up again. I have yet to see anything in the needle/seat area or the bowl, but it will run perfect only after I do all of the above. Just pulling the needle and seat out will not fix it.