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Message: [QUOTE="Yz250JdT250, post: 1190817, member: 53600"] Well if you move that clip up, that will make the needle sit further down, which would cause it to sit further into the main jet hole, which would lean it out at 1/4 throttle. The needle is what is stickin out of the slide in the carb, that the cable is hooked on to. You should get a manual if you dont have one. You could also try to just remember to open up the throttle every few minutes to clean out some of the unburnt fuel in the exhaust valve. If i bog my yz125 too many times without letting it into the powerband it will also foul a plug. [/QUOTE]