need ya'lls help, i had everything running great up until last weekend, so i thought anyway, well then i notcied it started running bad and found that the carb boot was torn, well now i have replaced it and it has an upper rpm miss that i cant get to stop. i put in new plug, jetted up and down the main and the pilot, cleaned up the air filter, and still nothing, seems to be ok until it warms up some and then it starts to miss out like if it were to rich, but i leaned it way out and it doesnt change, does anybody have any ideas? is it possible to have a coil breaking down when it gets hot? or something along those line? does anybody recomend any tests or anything? all help is greatly apperciated...

 

Try regapping the plug to .018-.020 and see what happens