Parts Unlimited RT4L BS AGM Battery RTX4L BS Maintenance Free Fits CRF110F CRF125F Grom Monkey KLX110 Z125 PRO TTR125 Bear Tracker RS50 DS70 DVX90 Viper 50 90 Pampera 450 Nexus 300

OVERVIEW

The Parts Unlimited RT4L‑BS AGM battery delivers dependable 12V starting power and consistent electrical distribution for dual‑sport motorcycles, dirt bikes, pocket bikes, and youth ATVs. Engineered as a direct replacement for the RTX4L/BS group size, this absorbed‑glass‑mat unit replaces traditional flooded designs with a permanently sealed construction that eliminates routine fluid maintenance. Built specifically for restricted battery compartments on sub‑250cc platforms, it instantly restores ignition readiness upon installation.

ENGINEERING & PERFORMANCE

This direct‑replacement battery leverages a high‑performance active plate formulation paired with an integrated anti‑sulfation additive to sustain strong cranking output even after extended garage storage. The absorbent glass‑mat matrix securely traps electrolyte within the cells, preventing tip‑over spills while absorbing frame vibrations that typically strip plates from conventional flooded units. Once the included external acid pack is poured and the casing is sealed, the internally stabilized chemical environment maintains stable voltage output through cold mornings, track sessions, and off‑road trail runs. The straightforward acid‑fill activation method restores reliable charging behavior without requiring tools or special equipment.

KEY FEATURES

• Maintenance‑free absorbed‑glass‑mat (AGM) design
• Permanently sealed casing after initial acid fill
• Holds charge up to three times longer than conventional flooded batteries
• High‑performance active material with integrated anti‑sulfation additive
• Vibration‑resistant internal architecture prevents plate stripping
• Leak‑proof construction absorbs shock impact during operation
• Includes external acid pack for simple field activation
• Direct RTX4L/BS group size replacement configuration
• Optimized for compact battery compartments on mini‑bikes and sub‑250cc machines

TECHNICAL SPECIFICATIONS

• Brand: Parts Unlimited
• Part Name: RT4L‑BS
• Component Type: AGM/Maintenance‑Free Battery
• Material Construction: Absorbed‑Glass‑Mat plate matrix with anti‑sulfation additives
• Supported Years: 1985–2021
• Compatible Trims: RTX4L/BS Group Size Replacement; Dual‑Sport, Dirt Bike, Pocket Bike, Youth ATV, and Compact Motorcycle Applications

FITMENT

• Honda CRF110F / CRF125F (2013–2020)
• Honda Grom / MSX125 (2014–2019)
• Kawasaki KLX110 / Z125 PRO (2003–2019)
• Yamaha TT‑R125 (2003–2021)
• Arctic Cat DVX 90 (2016)
• Polaris Scrambler 50 / Sportsman 90 (2001–2002)
• E‑Aeon Cobra CX‑Sport 50 / 90 (2000–2014)
• Can‑AM DS 70 / Quest 90 (2002–2019)

WHY RIDERS CHOOSE THIS

Riders choose the Parts Unlimited RT4L‑BS because its permanently sealed AGM construction eliminates routine electrolyte checks while delivering immediate, consistent crank performance across daily trail runs and weekend canyon passes. The glass‑mat matrix securely contains chemicals against tip‑over spills and absorbs frame vibrations, protecting internal plates from the physical stress that routinely damages flooded counterparts. Combined with extended charge retention, corrosion‑resistant terminal hardware, and straightforward acid‑pack activation, this compact 12V power source guarantees rapid ignition startups precisely where space is limited and reliability matters most. Sub‑250cc platform owners trust this zero‑maintenance upgrade to maintain steady electrical distribution from cold morning starts to high‑heat descents.