BikeMaster AGM Battery - MS12-12-BS - 780708

The BikeMaster AGM Battery MS12-12-BS (Part #780708) is a maintenance-free, non-spillable motorcycle battery built for riders who want reliable starting power without the upkeep of a conventional wet-cell battery. Using absorbed glass mat (AGM) technology, this BikeMaster Platinum battery captures electrolytes inside the mat itself — delivering higher performance and a longer storage life than standard flooded batteries. If you're tired of checking water levels or worrying about acid spills, this sealed AGM battery is a direct upgrade worth considering.

Key Features & Benefits

• Maintenance-Free Design: Permanently sealed construction means you never need to check electrolyte levels or add water — ideal for busy riders or bikes that sit seasonally.
• Non-Spillable AGM Construction: Electrolytes are absorbed into the glass mat, so there's no free liquid that can leak, making this battery safe to mount in virtually any orientation.
• Longer Storage Life: Compared to standard wet batteries, the AGM design retains its charge better during storage — a real advantage if your bike sits over winter.
• Higher Performance Than Standard Wet Batteries: The absorbed glass mat technology delivers stronger output, giving you more reliable cold-weather starts and consistent power delivery.
• Greater Cold-Cranking Amps: BikeMaster specifically highlights improved cold-cranking performance over conventional batteries, so your bike fires up dependably in cooler temperatures.
• Resists Sulfating: AGM batteries are less prone to the sulfation that kills conventional batteries left in partial discharge — extending overall service life.
• One-Year Manufacturer's Warranty: BikeMaster backs this battery with a one-year warranty, giving you peace of mind with your purchase.

Specifications

• Brand: BikeMaster
• Part Number / MPN: 780708
• Battery Reference: MS12-12-BS
• UPC: 887337003993
• Battery Type: AGM (Absorbed Glass Mat) — Platinum Series
• Maintenance Required: None — permanently sealed
• Warranty: One year (manufacturer)
• Storage Note: Requires charging during prolonged storage periods

Fitment

The BikeMaster MS12-12-BS is a motorcycle/powersports battery that replaces applications calling for the YTX12-BS battery group size — a common fitment across a wide range of street bikes, cruisers, and sport bikes. Because fitment depends on your specific year, make, model, and trim, we strongly recommend verifying compatibility before ordering. BikeMaster's own product page includes a vehicle selector tool to confirm fit, and our team at ThreePiece.us is available to help you cross-reference your OEM battery number or factory spec. Use the Get Fitment Help button on this page or call us directly — we're happy to confirm this is the right battery for your application before you buy.

Note: Always cross-reference the battery group size or OEM part number from your owner's manual or existing battery to confirm this is the correct replacement for your specific machine.

What's in the Box

This listing is for the BikeMaster AGM Battery MS12-12-BS (one battery). As an AGM battery, it does not require separate acid filling — it arrives ready to charge and install. Always perform an initial charge per BikeMaster's instructions before first use, and recharge during any extended storage period.

Why Buy from ThreePiece.us

• Free Shipping: Every order ships free — no minimums, no surprises at checkout.
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• Expert Fitment Support: Our team has served 10,000+ customers and is ready to help you confirm this battery fits your bike before you order. Reach us at 813-535-5801 or via the Contact Us page.
• Price Match Guarantee: Found it for less elsewhere? Ask us about our price match — we stand behind our pricing.
• Trusted Since 2014: Over a decade of experience helping enthusiasts find the right parts the first time.

Frequently Asked Questions

Q: Is this battery truly maintenance-free, or do I need to add acid?
A: Yes — the BikeMaster MS12-12-BS is a sealed AGM battery. It does not require you to add electrolyte fluid or check water levels. The absorbed glass mat construction permanently contains the electrolytes. However, BikeMaster does note that the battery requires charging during prolonged storage periods, so keep it on a maintenance charger if your bike sits for extended stretches.

Q: How is this AGM battery better than a standard wet-cell battery?
A: According to BikeMaster, the AGM design offers a longer storage life, higher performance output, greater cold-cranking amps, and improved resistance to sulfation compared to conventional wet batteries. The sealed, non-spillable design also eliminates acid leakage risk, making it safer and easier to live with day-to-day.

Q: How do I know if the MS12-12-BS fits my motorcycle?
A: The best way is to check your owner's manual for the OEM battery group size, or look at the label on your current battery. If it calls for a YTX12-BS group size, this BikeMaster battery is a common replacement candidate. If you're unsure, contact the ThreePiece.us team at 813-535-5801 or use the Get Fitment Help link on this page — we'll help you verify compatibility before you order.

Q: Does this battery come with a warranty?
A: Yes. BikeMaster covers the MS12-12-BS with a one-year manufacturer's warranty. Warranty claims can be initiated through BikeMaster directly. If you need help navigating the process after purchase, our customer service team is here to assist.