Yuasa YB9-B Yumicron 12 Volt Battery - YUAM229BY

• Special thin separators allow two extra plates per cell to be installed, for a 30 percent improvement in cranking performance
• Engineered to protect against corrosion, withstand vibration, and deliver high cranking power

The Yuasa YB9-B Yumicron 12 Volt Battery (YUAM229BY) is a conventional powersports battery engineered for a wide range of motorcycles, scooters, and street bikes spanning decades of production. As one of Yuasa's most trusted Yumicron-series motorcycle batteries, the YB9-B delivers enhanced cranking performance and extended service life — making it a popular direct-replacement choice for riders who want a reliable, name-brand Yuasa battery at a competitive price.

Key Features & Benefits

• Two Extra Plates Per Cell: Special thin plate separators allow two additional plates per cell to be installed, contributing to longer battery life and more consistent power delivery over the life of the battery.
• Up to 30% More Cranking Power: The Yumicron design delivers up to 30% more cranking power compared to standard conventional batteries, so your bike starts confidently even after sitting or in cooler temperatures.
• Yumicron CX Lead/Calcium Chemistry: Yuasa's Yumicron CX formulation provides 5% to 8% more cranking power than the standard high-output Yumicron, while also requiring minimal servicing — a real-world advantage for riders who want performance without constant maintenance.
• Shipped Dry (Acid Not Included): The YB9-B ships dry for safer transport and longer shelf life. Acid must be added and the battery charged before installation — standard practice for conventional motorcycle batteries.
• Hardware Included: The battery ships with hardware included, so you have what you need to complete the installation.
• Conventional Battery Design: Fits a broad range of vintage and modern applications that call for a conventional (non-AGM, non-sealed) YB9-B battery, making it an easy OEM-style replacement.
• Right-Side Vent, Left Positive Terminal: Specific terminal and vent placement ensures correct fitment in chassis designed for the YB9-B form factor.

Specifications

• Part Number: YUAM229BY
• Battery Model: YB9-B
• Battery Family: Yumicron / High Performance, Conventional
• Voltage: 12V
• Capacity (10-HR): 9 Amp-Hour
• Length: 5-5/16"
• Width: 3"
• Height: 5-1/2"
• Positive Terminal Location: Left
• Vent Location: Right
• Acid: Shipped dry — acid not included, must be added before use
• Riding Style: Street
• Hardware: Included

Fitment

The Yuasa YB9-B (YUAM229BY) fits a wide range of motorcycles and scooters. Below is a representative fitment list based on manufacturer data. Always cross-reference your owner's manual or use a battery finder tool to confirm fitment for your specific year, make, model, and trim before ordering.

• 1965 Honda CB160
• 1966–1969 Honda CB160 Sport
• 1966–1968 Honda CL160 Scrambler
• 1966–1971 Kawasaki A1 Samurai
• 1966–1967 Kawasaki A7 / A7 SS 350 Avenger
• 1967–1971 Kawasaki A7 Avenger / A7SS
• 1967–1974 Triumph Tiger
• 1968–1972 Honda CL175 Scrambler
• 1969–1973 Honda CB175 Super Sport
• 1969–1972 Kawasaki S1 Mach I
• 1972–1978 Triumph Bonneville T140 D / T140 E / T140 V
• 1973 Honda CL175K Scrambler
• 1973–1977 Triumph Bonneville 750 T140V (incl. 1977 Super Jubilee)
• 1974–1976 Honda CB200T
• 1974 Honda CL200 Scrambler
• 1976–1977 Honda CJ360
• 1978–1979 Honda CB400TI Hawk I
• 1981–1982 Honda CM200T Twinstar
• 1982–1983 Honda CM250C Custom
• 1984 Honda CH125 Elite
• 1985–1986 Honda CH150 Elite
• 1988–1990 Honda VTR250 Interceptor
• 2001–2010 Kawasaki BN 125A Eliminator
• 2009–2011 Aprilia RS 125
• 2009–2013 Piaggio Fly 150 / Fly 50 / Typhoon 50
• 2010–2013 Vespa LX 150 / LX 50 4V
• 2013–2014 Piaggio BV 350
• 2013 Piaggio Typhoon 125

Fitment note: This list reflects the stock configuration of each model. Any modifications to the original electrical system may affect compatibility. Confirm fitment with your owner's manual or Yuasa's battery finder before purchasing.

What's in the Box

• 1x Yuasa YB9-B Yumicron 12V Battery (dry, unfilled)
• Hardware included

Note: Electrolyte acid is NOT included and must be sourced separately. The battery must be filled with acid and fully charged before installation.

Why Buy from ThreePiece.us

• Free Shipping: Every order ships free — no minimum required.
• Affirm Financing: Break your purchase into manageable payments with Affirm financing available at checkout.
• Expert Fitment Help: Not sure if this Yuasa motorcycle battery fits your ride? Our team is here to help you verify fitment before you order — just reach out.
• Trusted Brands: We carry Yuasa batteries and other top powersports brands, so you're getting the real thing with the performance specs you expect.

Frequently Asked Questions

Q: Does the YB9-B come with acid included?
A: No. Like all Yuasa conventional batteries, the YB9-B ships dry — acid (electrolyte) is not included and must be purchased separately at a local motorcycle dealer, hardware store, or auto parts retailer. The battery must be filled and fully charged before it is installed in your vehicle.

Q: Does this battery need to be charged before installation?
A: Yes. Because it ships dry, the YB9-B requires both acid filling and a full initial charge before installation. Skipping the initial charge can reduce battery performance and lifespan.

Q: What is the difference between the Yumicron and the Yumicron CX?
A: The Yumicron CX lead/calcium formulation delivers 5% to 8% more cranking power than the standard high-output Yumicron, and it requires minimal servicing. Both use Yuasa's extra-plate-per-cell design for longer battery life.

Q: How do I confirm this battery fits my motorcycle?
A: Cross-reference your motorcycle's year, make, and model against the fitment list above, and always verify against your owner's manual. You can also contact ThreePiece.us directly for fitment assistance before placing your order.