in mine , i thought maybe a vacum leak , so i took a butane torch ( the gas ) & held it near the carb base & around the intake gaskets . no detectable change . i'm thinking it's in the idle circuit - but where to look ? ( i am going to try disconnect vacum advance & see what happens . ( i checked plugs - reset points ) i also will pull each plug wire one at a time to see what happens ( a poor wire ? but they are new ).
