Drag Specialties Starter Relay Switch Replaces Harley 31506‑79B | Fits FLT FX FL FXWG FXST FXR Dyna XL (1980–1993) | Made in Taiwan

OVERVIEW

This Drag Specialties starter relay switch serves as a direct electrical replacement for the factory unit on legacy Harley-Davidson motorcycles. Engineered with solid copper terminals and a corrosion-resistant plated housing, it restores dependable cranking power for owners maintaining early-era Sportster and touring platforms.

ENGINEERING & PERFORMANCE

Built to manage high current draw, this relay maintains consistent voltage delivery during engine cranking, reducing the risk of weak or delayed starts. The solid copper terminals and copper contact disc minimize electrical resistance, ensuring efficient power transfer under heavy load conditions. Plated brackets and canister elements protect critical connections from moisture and road debris, extending service intervals between replacements. Designed as a direct OEM-fitment substitute, it bolts into established mounting layouts without requiring modification or adaptive hardware.

KEY FEATURES

• Replaces Harley-Davidson OEM part number 31506-79B
• Direct OEM-style replacement design
• Engineered to easily handle high current draw
• Utilizes solid copper terminals and a copper contact disc
• Features plated brackets and canister to prevent corrosion
• Meets or exceeds original OEM specifications
• Manufactured in Taiwan

TECHNICAL SPECIFICATIONS

• Brand: Drag Specialties
• Part Name: Starter Relay Switch
• Part Type: Electrical
• Material: Copper terminals, copper contact disc, corrosion-resistant plated components
• Supported Years: 1980–1993
• Compatible Trims: FLT, FL, FX, FXWG, FXST, FXR, FXRS, Dyna Glide, XL Sportster

FITMENT

• Harley Touring (1984–1993)
• Harley FL / FX / FXWG (1980–1984)
• Harley FXR / FXST / FXRS (1986–1993)
• Harley Dyna Glide (1991–1993)
• Harley Sportster (1980–1993)

WHY HARLEY RIDERS CHOOSE THIS

Riders favor this relay because it reliably resolves the intermittent starting failures common in aging Harley wiring systems. The use of pure copper conductors and protective plating eliminates voltage drop, delivering immediate crank authority even after extended periods of storage or exposure to harsh weather. By adhering strictly to factory mounting geometry and electrical load ratings, it integrates seamlessly into vintage harnesses without aftermarket adapters or fabrication. This combination of proven metallurgy and precise OEM dimensions ensures long-term durability for collectors and everyday riders keeping early-classic models running smoothly.