There are two jets that will clog on this carb. One is the high speed jet which is part of the bowl nut holding the float bowl in place. The other is screwed into the left side of the carb and is called the idle jet. This screw has two passage ways which must be checked. One goes through the side of the screw and very seldom clogs. The other comes up through the bottom and is most often is found clogged. This jet is not easy to open for the DIY guys, as it is very small (.018”) and most don’t have the tools to open it. I use number drills and a pin vise starting with number 80 and go down finishing with number 77. You need to go very,very slow, being careful not to break the drill bit. PLEASE DO NOT USE WELDING TIP FILES, as they will ruin the jet very quickly.