Whats going on. I have a Dax 67 almost through 3/4 or a gallon so still running 16 to 1. grood smooth power at lower speed but then at mid speed it is rough. once it gets past that, the top speed is smooth again sometimes i can help it through the rough stage by peddling. What is going on I have my mix needle on the second from the top, or 3rd from the point. I tried going richer and leaner with the needle but second from the top works best for me. Is this normal? havent encountered any other MBs so not sure what its supposed to be like.