I recently changed my main jet on my 300ex from 122 (stock) to 128 dynojet size. after riding it for about 2 hours it keeps bogging down about half throttel. if i take my air-box lid off it makes it better but still boggs down at about 3/4 throttel. what can i do to fix this? i have a fmf pipe k&N filter with outerwears cover

thanks.