The RH Throttle Stopper Screw is a precision replacement part designed specifically for Yamaha PW50 Y-Zinger motorcycles spanning model years 1990 through 2025. This essential component directly replaces OEM part number 4X4-26257-00-00, ensuring proper fitment and reliable performance for your youth dirt bike. The throttle stopper screw plays a critical role in limiting maximum throttle opening, allowing parents and guardians to control the top speed of the PW50 for younger or less experienced riders. This makes it an important safety feature that can be adjusted as the rider's skill level progresses. This replacement screw is built to meet or exceed original equipment specifications, providing dependable operation for this popular entry-level motorcycle. Whether you're performing routine maintenance or replacing a worn component, this throttle stopper screw helps keep your PW50 running safely and smoothly for years of riding enjoyment.