Only the broad rear portion of the stock seat is meant for sitting on. The narrow front portion drops away to provide ground clearance at a stop. If you find yourself sliding down on the narrow portion while riding try rotating your bars back somewhat or installing handle bar extensions. A very slight forward lean angle of your torso will naturally keep you on the rear portion of the seat.
Last edited by twowheels; 07-02-2017 at 05:47 PM.