In 1983, Yuasa pioneered the first motorcycle maintenance-free AGM batteries with the YT series. In 1988, the YTX series was introduced and ever since then, Yuasa batteries have been seen as the industry de-facto standard in the global powersports battery market. That innovation has evolved into two unique directions, In 1999, the YTZ series, a compact, lightweight, high CCA battery was introduced as the first global Factory Activated (FA) design. In 2008, the GYZ series, their most powerful and toughest battery, was designed with the American rider in mind. The GYZ series lineup continues to expand and was Yuasa's second US Factory Activated (FA) design. Premium absorbed glass mat (AGM) technology. Sealed, non-spillable design. Meets or exceeds powersports O.E.M. specs. Maintenance Free - NEVER add water, but periodic charging required when not in use.