ikj,
I'm already running 130 mains, Thunderbike longs, TBS needles, and snorkel out. The bike's running good as it is and the plugs are a medium brown color. The drilled holes didn't seem to make a difference (s-o-p) in performance, but they did cause my air filter to get dirty a lot quicker.
I blame that on where I work as we have a lot of dust and dirt there. So I elected to put the button plug in the air box. I bent all the tangs out a bit to make sure I got a real tight fit, as I put it in from the outside - bottom of the air box.
