Was riding bike and noticed when I gave it gas it hesitated, kinda misfired, gave more gas then it stopped and kept going. It then got worse. It would start right up idle fine but when put it gear and give gas would do the same. Was told was carb. Ordered new one put on and same thing. Got to looking and the intake boot on back of carb had a crack in it. Ordered a new one, but while waiting on it to come in took the cracked one and put jb weld on it put it back on rode it ans done fine then about 10-15 mins and started the same thing. It only seems to do it once it warms up. What could it be. This thing is driving me nuts!!!