Motobatt Battery MB51814 Sealed Factory‑Activated Replaces: 51814, 51913

OVERVIEW

The MotoBatt MB51814 is a sealed, factory-activated AGM battery engineered to deliver reliable starting power and stable electrical distribution for BMW motorcycle platforms. Constructed with advanced Absorbent Glass Mat chemistry and reinforced internal components, this unit directly replaces aging OEM lead-acid cells while fitting securely into standard chassis configurations. It provides immediate installation readiness for riders needing dependable ignition performance without custom modifications.

ENGINEERING & PERFORMANCE

Constructed with sealed Absorbent Glass Mat technology, this battery delivers consistent voltage output and faster cranking cycles even under temperature extremes. The reinforced internal plate assembly and vibration-dampening design maintain structural integrity during aggressive riding and long-distance touring. Operating with a fully sealed, maintenance-free architecture, it eliminates acid handling and watering intervals while supporting direct bolt-on replacement across targeted BMW electrical systems.

KEY FEATURES

• Sealed Absorbent Glass Mat (AGM) construction for superior charge retention
• Elevated 22 amp-hour capacity and 260 cold cranking amps for rapid ignition
• QuadFlex terminal layout with four strategically positioned connection points
• Vibration-resistant internal design built for highway cruising and rugged terrain
• Maintenance-free sealed architecture eliminates electrolyte monitoring and acid spills
• Factory-activated cell chemistry ready for instant installation upon unpacking
• Direct cross-reference replacement for OEM Yuasa 51814 and 51913 specifications
• Optimized dimensions accommodate tight engine compartments and varied chassis layouts

TECHNICAL SPECIFICATIONS

• Brand: MotoBatt
• Part Name: MB51814 Sealed AGM Battery
• Component Type: Battery
• Material: Sealed Absorbent Glass Mat (AGM)
• Supported Years: 1970–2009
• Compatible Trims: BMW R50/5, R60/5, R850R, R1100GS, R1100R, R1100RS, R1100RT, R1100S, R1150GS, R1150R, R1200C, K75C, K75S, K1100LT, K1100RS, K1200RS, K1200LT, K1200GT, K1200RT, K1200S

FITMENT

• BMW R50/5 (1970–1973)
• BMW R60/5 (1970–1973)
• BMW R850R (1995–1997)
• BMW R1100GS (1994–2000)
• BMW R1100R (1994–2000)
• BMW R1100RS (1993–2000)
• BMW R1100RT (1993–2000)
• BMW R1100S (1999–2005)
• BMW R1150GS (2000–2005)
• BMW R1150R (2000–2005)
• BMW R1200C (1998–2005)
• BMW K75C (1985–1995)
• BMW K75S (1985–1995)
• BMW K1100LT (1990–1995)
• BMW K1100RS (1990–1995)
• BMW K1200RS (1997–2005)
• BMW K1200LT (1999–2009)
• BMW K1200GT (1999–2009)
• BMW K1200RT (2005–2009)
• BMW K1200S (1999–2005)

WHY RIDERS CHOOSE THIS

Riders select the MB51814 because its upgraded 260 CCA rating and 22 Ah capacity permanently eliminate the slow cranking and voltage drop common with deteriorating factory batteries. The proprietary QuadFlex terminal system routes wiring away from heat sources and moving parts, which drastically reduces terminal fatigue and corrosion over extended service life. Delivered fully charged and housed in a spill-proof casing, this battery guarantees steady electricity flow to ignition modules and onboard electronics. Engineered specifically for designated BMW platforms, it offers a direct fit that upgrades overall system reliability while completely removing routine charging inspections.