Yuasa motorcycle battery YTZ5S-BS compact AGM starter battery, 65 CCA maintenance-free

Yuasa YUAM62TZ5 (YTZ5S-BS) is a compact, maintenance‑free AGM starter battery designed to deliver high starting power and strong vibration resistance for motorcycles and powersports vehicles. Yuasa engineered the YTZ5S-BS with an expanded plate grid and advanced active/separator materials to maximize cold cranking performance while surviving the shocks and vibrations of everyday riding. Shipped dry with an acid bottle, this valve-regulated Absorbed Glass Mat (AGM) battery is nonspillable and ready to activate when you need reliable starting power in a small, lightweight package.

How much starting power does this battery provide?

The YTZ5S-BS supplies a robust burst of current tailored for small engines: 65 C.C.A. measured at 0 °F (-18 °C). Its increased plate count and optimized grid design improve surface area for faster discharge during engine start.

• Cold Cranking Amps (CCA): 65 at 0 °F (-18 °C)
• Capacity: 3.5 Ah @ 10HR for reserve power
• Regular charge current recommended: 0.4 A

What makes this battery maintenance‑free and vibration‑resistant?

Absorbed Glass Mat separators lock in electrolyte so the battery is nonspillable and valve‑regulated, eliminating the need to add water. The construction uses compounded active materials and an expanded plate grid to tolerate repeated vibration and extend service life under rough conditions.

• AGM design: electrolyte absorbed, nonspillable, valve-regulated
• Enhanced plates and separators formulated for vibration durability
• No periodic water top-ups required after activation

How do I activate and install the bottle‑supplied (BS) battery?

The YTZ5S-BS ships dry with electrolyte in a separate bottle; fill the battery with the supplied acid container just before first use. After filling and allowing the initial soak period, the battery is ready to be charged and installed following vehicle polarity and mounting guidelines.

• Comes with acid bottle for on-demand activation to maximize shelf life
• Follow fill and soak instructions included with the battery
• Install securely with correct terminal polarity to avoid damage

Will this battery fit my bike and how big is it?

The compact YTZ5S-BS fits many motorcycles, scooters, ATVs and other small vehicles that accept YTZ5S-size batteries. Check your vehicle’s battery tray and terminal orientation against the dimensions below before ordering.

• Dimensions: 113 mm (length) × 70 mm (width) × 86 mm (height)
• Weight with acid: 3.5 lbs (approx.)
• Common replacement for vehicles specifying YTZ5S/YUAM62TZ5 form factor

Who is this for Riders and technicians who need a dependable, compact starter battery that tolerates vibration and delivers consistent cold‑start performance will value the YUAM62TZ5. It’s well suited for street motorcycles, off‑road bikes, scooters and specialty powersports machines where space is limited and maintenance convenience matters. Choose this model if you want a dry‑shipped AGM that you activate when ready and then enjoy a sealed, maintenance‑free power source built by a trusted battery manufacturer.

FAQ

Q: Do I need to add water after activation?

A: No. Once filled and activated, the valve‑regulated AGM design prevents water loss and requires no refilling.

Q: Can I ship the battery by mail before filling?

A: Yes. Bottle‑supplied batteries ship dry; fill with the provided acid bottle when ready to use.