these are pictures of the new racing Carb but I can't seam to make it stay on without playing with the throttle. I already tried all the settings Frm 1 to 4. this is the first time buying a slant head motor with this new Carb. i have bought other motors Frm thatsdax and they start right and good. I just really need some help if anybody has had a problem like this let me know what I am doing wrong.