PROBLEM: I have a bog or hesitation at about half throttle...

SOLUTION: Since the problem is between about 1/4 and 3/4 throttle, your needle clip position may be rich or lean. If you know the jetting in this range is too lean, move the needle clip down one clip position (richer-moving the clip towards the pointy end of the needle). If you're sure it's rich, move the clip up one clip position (leaner-moving the clip towards the blunt end of the needle). If you're not sure if you're rich or lean, try the choke trick; with the motor fully warmed up pop the choke out to the first notch and see if the problem gets better or worse; if better then try going a slot richer on the needles; if worse try going a slot leaner on the needles. Remember to check the carb/s sync whenever the tops are off the carb/s, and don't get the slides reversed; the cutout on the bottom of each slide should face the air box.

By: Nickxc