This carburetor rubber cap is designed for Yamaha Majesty 125/250, YP125E, YP180E, VP300, YP250, YP300, ZY100, JOG100, RS100, RSZ100, and related 100cc models. It serves as a direct replacement for worn, cracked, or missing rubber caps on the carburetor. A damaged or deteriorated cap can cause vacuum leaks, leading to rough idling, poor throttle response, or starting issues. Replacing this component helps restore proper carburetor function and reliable engine performance. Whether performing routine maintenance or troubleshooting fuel system problems, this replacement part offers a practical solution for keeping your scooter's engine running smoothly.