[Tomcobra17]

Bucking back and forth is generally a lean condition. Try turning your idle screws ( all 4) counter clockwise about a 1/16 of a turn and see if that helps.

Please post the carb specs from the card that came with your quickfuel. How far out from closed are your idle mixture screws? Did you set your primary transfer slot to square when looking from underneath the trottle plate? Once this is done, you adjust your idle speed using the secondary idle speed screw on the secondary side for quickfuel carbs. Where are your float levels set on both primary and secondary? Should be in the middle of the sight window for quickfuel carbs.

We need a little more info to help.

Thanks,

Tom