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Deliver massive cranking capacity and maximum electrical reliability for your heavy V-twin cruiser, touring bike, UTV, or high-displacement powersports machine. The Yuasa GYZ20HL High Performance Maintenance Free AGM 12-Volt Battery represents Yuasa’s flagship engineering in Absorbed Glass Mat (AGM) power modules [MPN: YUAM720GH]. Factory-activated, sealed, and ready to install right out of the box, this premium battery is built with heavy-duty radial grid designs and advanced lead-calcium technology. The result is superior Cold Cranking Amps (CCA), enhanced resistance to deep discharges, and maximum durability under harsh engine vibration and high operational heat.
This factory-sealed AGM battery conforms to standard GYZ20HL casing dimensions (175 mm x 87 mm x 155 mm / 6.875 in. x 3.44 in. x 6.125 in.), featuring a Left-Side Positive and Right-Side Negative terminal polarization layout. Engineered with heavy-duty brass terminals and embedded brass nut inserts, it provides flush, low-resistance front and top connection options that maintain clamp tightness despite engine vibration. The spill-proof AGM architecture absorbs all liquid acid into micro-fiberglass mats, eliminating maintenance, fluid checks, and vent tubes entirely while delivering exceptional shelf life during off-season storage.
This factory-activated GYZ20HL battery fits OEM battery trays requiring a 175 mm x 87 mm x 155 mm footprint with Left-Hand Positive polarity layout. It serves as a high-performance upgrade replacement for standard YTX20HL-BS, YTX20L-BS, YTX20HL, and YTX20L batteries across motorcycles, UTVs, ATVs, and personal watercraft demanding extreme cold-cranking capacity in a heavy-duty casing format.
CRITICAL INSTALLATION AND SAFETY NOTES: This battery is factory-activated, sealed, and fully charged prior to shipment. Do not attempt to open, unseal, or add water/acid to the top cover. Always disconnect the negative (-) ground cable first during battery removal and reconnect the negative (-) ground cable last during installation to prevent accidental chassis electrical shorts. Verify clean, tight terminal contact using the included mounting hardware, and connect an automatic smart maintainer during extended storage periods to keep voltage at peak capacity.
| Field | Value |
| Brand | Yuasa Batteries |
| Model Series | GYZ High Performance Factory Activated AGM |
| Part Number / Designation | GYZ20HL (YUAM720GH) |
| Battery Technology Type | Factory Activated Sealed Absorbed Glass Mat (AGM) |
| Cold Cranking Amps Rating | 320 CCA |
| Capacity Amp Hours Profile | 20 Ah (10 HR Rating) |
| Nominal Circuit Voltage | 12V Nominal |
| Terminal Polarization Layout | Left Hand Positive (+) / Right Hand Negative (-) |
| Maintenance Requirement | 100% Maintenance-Free Sealed Module |
| Primary Vehicle Fitment Segment | Heavy V-Twin Cruisers, Touring Motorcycles, UTVs, Large ATVs |
| Product Dimensions | 6.875 x 3.44 x 6.125 inches — 175 x 87 x 155 mm |
| Product Total Weight | 15.0 lbs — 6.8 kg |
Not every product runs through our fitment finder, and we would rather you confirm exact fitment than rely on a partial filter. Match the specifications against your machine or the part you are replacing, or contact us and we will confirm it for you.
Ask a Parts Specialist →| Brand | Yuasa Battery |
|---|---|
| SKU: | YUAM720GH |
| MPN | YUAM720GH |
| UPC: | 48493728247 |
| Condition: | New |
| air_freight_prohibited | false |
| not_carb_approved | false |
| ltl_freight_required | false |
| prop_65 | Unknown |
| part_type | powersports |
| epa | N/A |
| carb_acknowledgement_required | false |
| regular_stock | t |
| units_per_sku | 1 |
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