the bike is a 99 kx125 w/ procurcuit pipe/304 silencer,boysen cf reeds,big bore kit(54 i think it is).my problem is that it has a flat spot at about 1/3 throttle.im running it 40:1 synthetic,br9es plug.the guy i bought it from said he was the original owner and only ran c16 in it from new,im running 94 pump gas with octane booster but still a dog down low.it will stall idleing because its to rich(plugs soaked when i take it out)if its wot it takes a second to get rpm but then takes off ok.ive completely redid the top end and cleaned everything spotless.im worried if i start playing with the jetting i might lean it out.i dont know what jets/clip setting its at right now until i pull it apart but im looking for some ideas as to where to start.any suggestions.let me know if you need more info.