Yamaha - Fuel Tank Cap Assembly Fuel System Component YF1-25214-10-30. Overview. Fuel caps are easy to overlook, but I've seen plenty of issues come from a cap that doesn't seal or vent properly. From fuel smells to pressure problems, it can throw things off more than you'd expect. The Yamaha Fuel Tank Cap Assembly YF1-25214-10-30 keeps the tank sealed while allowing it to breathe the way it should. It's a simple part that helps keep your fuel system clean, safe, and running right.. Key Features. • Secure Fuel Tank Seal - Helps prevent fuel leaks and keeps contaminants out of the tank.. • Yamaha Engineered Fit - Designed to match factory threads and sealing surfaces.. • Integrated Venting Function - Allows proper pressure balance within the fuel tank.. • Durable Construction - Built to handle fuel exposure, weather, and marine conditions.. • Direct Replacement Assembly - Installs easily for quick and reliable replacement.. Engine & Boat Compatibility. The Yamaha Fuel Tank Cap Assembly