Need Help jetting the 300... (Video to help)

[Cody_300ex]

I need help jetting it, its got a 140 MJ in it right now but it cuts out at about 1/3 throttle to about 3/4s then it just takes off. Its a stock 300ex carb. heres the vid to help get an idea, http://media.putfile.com/ModQuad

[zeppelin]

well form the video it sounds fine, but from what you said about being slugish off the bottom, id say your too rich. what size pilot do you have in there?