YSS PD Valve The Doodlebops Best Noise Ever YouTube. Revolutionize your motorcycle's front suspension with the YSS PD Valve, a state of the art fork emulator designed to enhance your riding experience. This innovative valve transforms conventional damping systems into a more sophisticated, adjustable setup, allowing for precision tuning to match your unique riding style and road conditions. The YSS PD Valve works seamlessly within your existing fork structure, delivering the performance benefits of a much more expensive suspension setup at a fraction of the cost. It's the perfect upgrade for riders seeking improved handling, stability, and comfort. Whether navigating tight city streets or cruising on open roads, the YSS PD Valve ensures a smoother, more responsive ride, elevating your motorcycle's performance to new heights.