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Just installed a Powercore 4 on my 2010 tee dub and am enjoying a pretty noticable increase in midrange power. It seems to idle alright, and for the most part runs ok. However, if the engine goes from a heavy accelleration or 3/4 throttle to full closed (getting off a highway) it blubbers and pops. If you pull the clutch lever in it goes to the idle circuit and seems to correct itself. How can I smooth her out? I reckon I need a little bigger main jet in the carb. It's a Mikuni. I have not modified the intake at all and want to adjust one carb item at a time so I can keep stuff close to being right. Any other thoughts?