Replacement Battery for YTZ7S, UTZ7S, GTZ7S, PTZ7S, FAYTZ7S, MBTZ7S and WPZ7S. Mfr Part Number: STZ7S (120 CCA) AGM Maintenance Free Item Package Quantity: 1 Guaranteed compatibility with OEM battery This is Yamaha 450CC WR450F, 2003-2006 replacement motorcycle battery that is AGM Maintenance Free. Your job is already done - no more filling with acid! This is a replacement battery for YTZ7S, UTZ7S, GTZ7S, PTZ7S, FAYTZ7S, MBTZ7S and WPZ7S. The Power Source WPZ7S replacement motorcycle battery is AGM Maintenance Free, fully charged and ready to install. The motorcycle battery offers optimal cranking amps, superior performance and is designed for motorcycle and power sports units, where high power output is required over short periods of time. The WPZ7S motorcycle battery comes with 6 months warranty.