Yuasa - YTX9-BS AGM Maintenance Free Battery

Yuasa YTX9-BS AGM Maintenance Free Powersports Battery The Yuasa YTX9-BS (YUAM329BSIND) is a 12-volt Absorbed Glass Mat (AGM) maintenance-free battery engineered for dual-sport, street, and middleweight sport motorcycles, as well as ATVs and personal watercraft. In high-vibration single-cylinder engines and high-revving multi-cylinder motorcycles, conventional flooded lead-acid batteries frequently suffer from premature failure due to acid spilling, electrolyte boil-off, and internal lead plate fracture. The YTX9-BS eliminates these issues through a factory-engineered, valve-regulated sealed casing. The battery features micro-porous glass mat separators that absorb and hold all liquid electrolyte against high-purity lead-calcium grid plates. This design eliminates free liquid acid inside the case, allowing the battery to withstand severe off-road vibration and frame impact shock without internal shorting. The YTX9-BS delivers 135 Cold Cranking Amps (CCA) and an 8.0 Ah capacity while holding its resting voltage up to three times longer than standard lead-antimony batteries during off-season storage. Shipped dry alongside a pre-measured multi-cell electrolyte pack (Bottle Supplied / BS), the battery maintains a 100% factory-fresh chemical shelf life until filled and sealed. Features: Absorbed Glass Mat (AGM) Construction: Microfiber glass mat separators suspend all liquid acid, delivering a spill-proof, leak-proof design once sealed. 135 Cold Cranking Amps (CCA): Reliable starting power tailored for large-bore single-cylinder dual-sports and high-compression multi-cylinder sport engines. Lead-Calcium Alloy Grids: Minimizes internal electrical resistance, reduces water consumption, and holds specific gravity significantly longer during seasonal storage. Vibration-Damped Internal Plates: Compressed internal cell groups resist continuous thumper engine vibration and harsh trail impacts. Permanent Hermetic Seal: Once capped with the included sealing strip, the battery is permanently sealed and requires zero water top-offs. Dry-Pack Freshness (BS): Shipped dry with a dedicated pre-measured acid pack to prevent self-discharge or sulfation before purchase. What's in the Box: 1x Yuasa YTX9-BS Dry AGM Battery Housing 1x Pre-Measured Multi-Port Electrolyte Acid Pack (0.40 L) 1x Permanent Snap-In Sealing Cap Strip 1x Terminal Hardware Kit (M6 Lead Terminal Bolts & Rectangular Nuts) 1x User Manual & Activation Instruction Sheet Fitment Notes: Terminal Polarity: Positive (+) on the Left, Negative (-) on the Right when facing the front terminal wall ([+ -]). Dimensional Footprint: Measures 5-7/8" L x 3-7/16" W x 4-3/16" H (150 mm x 87 mm x 105 mm). Dimensional Distinction from YTX12-BS: While the YTX9-BS shares the identical 150mm length and 87mm width of the YTX12-BS, it is significantly shorter at 105mm in height (compared to 130mm for the YTX12-BS) and provides 135 CCA / 8.0 Ah rather than 180 CCA / 10.0 Ah. Electrolyte Absorption Rest Interval: Proper initial activation directly establishes the operating lifespan of an AGM battery. After pressing the pre-measured multi-cell acid pack into the battery ports and letting the liquid drain fully, do not snap the sealing strip on immediately. Leave the battery open and uncapped for 30 to 45 minutes. This resting interval permits the dense glass matting to fully absorb the acid into the plates and allows chemical heat and reaction gases to escape. Sealing the battery prematurely traps heat inside, which can bulge the battery walls and create localized dry spots that permanently reduce cranking power. Mandatory Initial Bench Charge: An initial acid fill brings the chemical potential of the battery to roughly 75–80% of its full capacity. Installing the battery into a motorcycle immediately after filling causes rapid plate sulfation and permanently reduces its reserve capacity. Once the resting period is complete, press the sealing cap strip flush with hand pressure or light taps with a rubber mallet, then connect the battery to an automatic motorcycle smart charger (0.8A to 0.9A recommended) until resting voltage stabilizes at 12.8V or higher. Single-Cylinder Battery Box Damping: On large-displacement single-cylinder dual-sports like the Suzuki DR650 and Honda XR650L, engine harmonics can vibrate loose battery hardware. Ensure the factory rubber base pad and retaining strap are supple and securely fastened. If fitting into an aftermarket aluminum battery relocation box, line the contact walls with high-density closed-cell foam to prevent hard metal-to-plastic contact, and apply a dab of dielectric grease across the terminal connections to prevent corrosion from pressure washing and water crossings. Battery Type: YTX9-BS Battery Family: Fresh Pack, Maintenance Free Voltage: 12 Capacity (10-HR): 8 Dimensions: 6 in. x 3 7⁄16 in. x 4 3⁄16 in. Weight: 6.6 lbs. Metric Dimensions: 150mm x 87mm x 105mm Acid Volume: 0.4 L Amps: 0.9 C.C.A: 135 Country: INDONESIA Terminal: Part Number: YUAM329BSIND