I just need a lot of help.I have tried 2 different carbs nt and a speed nt,and replaced magneto side seal right off the bat from day one.I'm having idling issues it's idling higher than I like,so I turned the idle screw to idle it down nothing happens.I sealed the intake gasket with seal all and the carbs to intake with rtv gas and oil resistance.I also checked the carbs the make sure the slide was going all the way down.The throttle cable moves freely that I'm a ware of.I also took off the adjustment throttle cable nuts and screw the cable all the way in at both ends.Where I'm at now is the engine Idles good at first as it warms up it goes higher but it stays there like it's at 1/4 to 1/2 throttle so it's really doesn't race high,but higher then I like.Any suggestion or ideas what to try would help.