Harddrive Regulator - Black Dyna `2008-2017 OEM 74631-08a — Harley-Davidson Dyna Street Bob, Dyna Fat Bob, Dyna Wide Glide (2008-2017)

Harddrive regulator-rectifier for Harley-Davidson Dyna models 2008-2017, engineered to meet or exceed OEM specifications. Built with high-power SCR (Silicon Controlled Rectifier) technology and sealed thermal protection for cooler, more reliable operation.

Features

• Meets or exceeds OEM 74631-08a specifications
• High-power SCR (Silicon Controlled Rectifier) for cooler operation
• Sealed encapsulation — high temperature and environmentally protected
• Advanced surface-mount circuit board minimizes thermal impedance
• OEM-grade wiring harness rated for high temperature and voltage

Specifications

• Brand: Harddrive
• Manufacturer Part #: H3108
• UPC: 191361169946
• Dimensions: 5.3 in L × 5.5 in W × 2.9 in H
• Weight: 1.525 lbs
• Country of Origin: China (Mainland)

Fitment

Fits Harley-Davidson Dyna models 2008 through 2017. Direct OEM replacement for part number 74631-08a.

Frequently Asked Questions

Will this fit my 2008-2017 Harley Dyna?

Yes — this is an OEM-equivalent regulator-rectifier for all Dyna models in that year range, replacing Harley part 74631-08a.

What does a regulator-rectifier do?

It manages the motorcycle's charging system, converting AC current from the alternator to DC current and regulating voltage to the battery and electrical components.

Is this a direct bolt-in replacement?

Yes — the OEM-grade wiring harness and mounting are designed for direct installation into stock locations.

Will this run cooler than the OEM part?

The high-power SCR and sealed thermal design allow more efficient heat dissipation, which can extend component life and improve reliability.