Drag Specialties GYZ20H Premium Performance AGM Battery For Harley 1974-2000

Maximum Cranking Power: 310 CCA

When it comes to firing up a classic Big Twin or Sportster, power is everything. The GYZ20H boasts 310 Cold Cranking Amps (CCA), providing a high-amperage surge that ensures rapid engine turnover even in cold weather. With a 20Ah (Amp-Hour) capacity, this battery offers a massive reserve of energy, allowing it to handle the parasitic loads of modern add-ons like security systems or upgraded ignition modules without compromising its starting ability.

Advanced AGM & Lead-Calcium Technology

Built with Absorbed Glass Mat (AGM) technology, the GYZ20H features lead-calcium plates that are more efficient and durable than traditional lead-antimony designs. The electrolyte is completely absorbed into specialized glass mat separators, making the battery 100% leak-proof and spill-proof. This sealed design is crucial for protecting your classic bike’s frame, chrome, and oil tank from the corrosive acid damage often associated with older vented battery styles.

Vibration Resistance for Rigid and Rubber Mounts

Classic Harleys, particularly those from the Shovelhead and Evolution eras, are notorious for intense engine vibration. The Drag Specialties GYZ20H is constructed with reinforced internal grids and a heavy-duty case designed to absorb mechanical shock. By preventing plate shedding and internal breakage, this battery maintains its structural integrity through thousands of miles of hard riding, ensuring it outlasts conventional replacements.

Factory Activated: Ready for the Road

There is no need for messy acid filling or time-consuming initial charges. The GYZ20H is Factory Activated, meaning it is filled, sealed, and fully charged at the factory under optimal conditions. This ensures a perfect chemical balance and a longer overall lifecycle. Its maintenance-free design means you will never have to check fluid levels or add distilled water, giving you more time on the road and less time on the workbench.

Compatibility and Fitment (1974-2000)

The GYZ20H is a premium direct replacement for OEM Part Numbers 65991-82A and 65991-82B, as well as the YTX20H-BS. It is designed for:

• Harley Sportster (XL): 1979–1996 models.
• Harley Softail (FXST/FLST): 1984–1990 models.
• Harley Dyna (FXD): 1991–1996 models.
• Harley FL/FX Models: Select models from 1974–1986.
• Custom Builds: Ideal for rigid frames and high-compression Evolution or Shovelhead engines.