Yuasa YTZ5S-BS Motorcycle AGM Starter Battery — 65 CCA, Maintenance-Free, Acid Pack

The Yuasa YUAM62TZ5 (YTZ5S-BS) is a compact, maintenance-free AGM starter battery engineered to deliver reliable cold-cranking power and vibration resistance for motorcycles and powersports vehicles.

Built around an expanded plate grid and enhanced active materials, this bottle-supplied YTZ5S-BS model combines absorbed glass mat (AGM) technology with valve-regulated construction to create a nonspillable, low-maintenance power source. It ships dry with electrolyte in a separate bottle so you fill and activate it when needed, making storage and shipping easier. Its small footprint and 65 CCA rating suit many small-displacement motorcycles, scooters, and ATVs that demand quick starting and long service life under vibration.

How does this battery deliver dependable starting power?

The YUAM62TZ5 uses a denser plate layout and upgraded active materials to increase surface area and conductive pathways, producing stronger starting bursts. AGM separators lock in electrolyte to maintain consistent contact with the plates for reliable performance even after repeated starts.

• 65 cold cranking amps (CCA) at 0 °F (-18 °C) for strong cold starts
• 3.5 Ah capacity at 10-hour rate for reserve energy between charges
• Expanded plate grid design for higher instantaneous output

What makes this an AGM "maintenance-free" battery?

Although shipped dry with a separate acid bottle, once filled the AGM construction absorbs the electrolyte into glass mats, preventing spills and eliminating the need to add water. A valve-regulated design controls internal pressure and avoids electrolyte loss, so routine topping up isn’t required.

• Absorbed Glass Mat separators trap electrolyte to prevent leaks
• Valve-regulated casing reduces water loss and maintenance tasks
• Supplied with acid bottle for on-demand activation and safer storage

How durable is it against vibration and heavy use?

Yuasa engineered the YTZ series with reinforced plate and separator materials formulated to tolerate severe vibration common on off-road and high-rev machines. That construction helps extend service life by minimizing plate damage and maintaining internal contact under shocks.

• Enhanced active materials resist mechanical degradation
• Compact, rigid case reduces internal movement under vibration
• Designed for frequent starts and rough-road conditions

Will this battery fit my bike and how do I install it?

The YTZ5S-BS is a small-format battery; confirm dimensions and terminal orientation before purchase. Installation requires filling with the supplied acid, allowing activation time, and following polarity and mounting instructions in your vehicle manual.

• Dimensions: 113 mm L × 70 mm W × 86 mm H (5 7/16" × 2 3/4" × 3 3/8")
• Weight with acid: 3.5 lbs; regular charge current: 0.4 A
• Capacity: 3.5 Ah (10HR); fill from included bottle and follow safety steps

Who is this for? Riders, mechanics, and powersports owners who need a compact, durable starter battery that tolerates vibration and offers nonspillable convenience will appreciate the Yuasa YUAM62TZ5 YTZ5S-BS. It's well suited for small motorcycles, scooters, ATVs, and similar vehicles where space is limited but dependable starting and low maintenance are priorities. Choose this model if you want AGM reliability with on-demand activation and a trusted OEM-quality design.