i belive its the way i bought the carb NEW. i did lower the needle 1 notch so raised the clip one groove, basicly bought the carb and bolted it on and ran it. the slow jet that came in it was a 50 it seem to run good down low and doesnt load up so i left it alone i did have to jet up on the main the plug was a bit white think the main was a 158 might have been a 160 i do remember i was running almost a 175 on the main for a while but when i went to a track that was mainly sand and she was wfo on long pulls in the straits it was spittering out on the big end so i ended up leaning it out to a 165 or 162. that got rid of the sputtering. also found the bolts holding the coil on started to come loose that could of defintly been a grounding problem.

What needle are you running? What clip setting?

Nice race qwads you have there