How strict are they on the sound test? Last year with a stock pipe and PMB sparky, I supposedly passed on my crf450. While my friends with a stock yz426 and a wr250 didnt. They just told them/warned them and let them ride anyway. Now I have a Big GUn slip on (somewhat louder than stock) with a sparky. Will they give me a hassle? Should I just put on the stock pipe for the weekend? Do those PMB quiet inserts significantly affect the bikes power? We wont be getting there till around 3, so I dont want to mess around with it when I get there.