Got my new Glen's perm A/F screw and finally had time to put it in the carb. First let me say that if you have the stock airbox get ready to remove the usual parts, seat, tank, airbox and what ever else you might want to remove. Once that is done and the old A/F screw is removed it is a piece of cake. The screw come complete with spring, washer and o-ring somethignI was not expecting, went in very easy and was no problem adjusting. This is a must have for all of us stock airbox guys. Thanks Glen.