WP7B-4 Motorcycle Battery (Replacement) Replacement Battery for YT7B-BS, GT7B-4, PT7B-4, UT7B-4, CYT7B-BS, MB7U and WP7B-4. Mfr Part Number: ST7B-BS (120 CCA) AGM Maintenance Free Item Package Quantity: 1 Guaranteed compatibility with OEM battery