Motobatt Battery MBT4BB Sealed Factory‑Activated Replaces: YT4B‑BS

OVERVIEW

The Motobatt MBT4BB delivers dependable starting power and stable voltage output as a sealed factory-activated AGM motorcycle battery engineered specifically for youth competition platforms. By replacing conventional lead-acid units prone to sulfation, this direct-factory alternative ensures consistent ignition reliability while maintaining maintenance-free operation. Built with Absorbent Glass Mat chemistry, it provides immediate engine turnover without the heavy upkeep typical of stock power sources.

ENGINEERING & PERFORMANCE

Engineered with dedicated Absorbent Glass Mat chemistry, this unit maintains elevated electrical output and rapid throttle response recovery even across demanding ambient temperatures. The sealed glass-mat design actively resists internal component shifting and external electrolyte loss, ensuring long-term voltage stability under sustained mechanical stress. Its vibration-resistant casing and factory pre-charged architecture eliminate routine upkeep while delivering direct OEM-style bolt-in installation into targeted mounting trays.

KEY FEATURES

• Factory-activated sealed AGM construction eliminates electrolyte refills and routine maintenance
• QuadFlex multi-terminal bracket accommodates flexible positive and negative cable routing
• Maintains stable voltage rails and reliable engine turnover in diverse operating conditions
• Extended cycle life supported by robust internal plate formation and advanced electrolyte absorption
• Vibration-resistant casing built to withstand rough trails, track days, and sustained high-G maneuvers
• Direct OEM replacement engineered to bolt directly into specified youth sport bike and compact scooter mounting trays
• Compatible with multiple small-displacement Yamaha and Suzuki platforms out of the box

TECHNICAL SPECIFICATIONS

• Brand: Motobatt
• Part Name: MBT4BB
• Component Type: Battery
• Material: Sealed Absorbent Glass Mat (AGM)
• Voltage & Chemistry: 12V
• Amp-Hour Rating: 2.5 Ah
• Cold Cranking Amps: 50 CCA
• Terminal Configuration: QuadFlex Multi-Terminal
• Dimensional Profile: 4.45 L × 1.50 W × 3.42 H inches
• OEM Cross Reference: Replaces YT4B-BS
• Supported Years: 2003–2009 (application-specific model ranges apply)
• Compatible Trims: Youth Sport Bikes and Compact Scooters

FITMENT

• Yamaha TTR90E Electric Start (2003–2007)
• Yamaha TTR50E (2006–2007)
• Yamaha YJ50R Vino / Vino Classic (2001–2005)
• Suzuki DR-Z70 (2008–2009)

WHY RIDERS CHOOSE THIS

Riders select this AGM upgrade because it consistently outperforms degrading stock lead-acid units, maintaining immediate engine turnover and preventing stalling during low-speed technical riding. The sealed glass-mat design and vibration-resistant casing deliver lasting electrical stability across heat cycles and trail impacts, while the QuadFlex terminal brackets simplify wire routing and eliminate strained connector seating. Designed as a direct drop-in replacement for tight-clearance youth sport bikes and compact scooters, it restores full factory mounting security without adding bulk or requiring aftermarket wiring adapters. This combination of structural durability and precise fitment ensures reliable ignition and charging distribution mile after mile.