Have you tried adjusting the needle or air/fuel mixture screw on the carb? If not I would try adjusting first before rejetting. Just remember where you settings where at in case you need to start over again. Myself I would start with raising the e-clip up a notch on the needle, by doing this it will drop the needle down in the jet futher lessing the fuel flow. The air fuel mixture should be out 2.5-3 turns out.