Kuryakyn Diode Kit For LED Turn Signals - 4709

The Kuryakyn Diode Kit for LED Turn Signals (Part #4709) is an essential wiring accessory for metric motorcycles equipped with a single turn signal indicator light on the dash. If you're upgrading your bike's turn signals from incandescent bulbs to LED units, this diode kit is a required component — without it, power will back-feed through the indicator light and cause all four turn signals to flash simultaneously instead of alternating correctly. It's a small part that makes the difference between a clean LED upgrade and a frustrating electrical headache.

Key Features & Benefits

• Prevents Back-Feed Electrical Issues: When LED turn signals are installed on a bike with a single dash indicator, voltage can travel the wrong direction through the circuit. This diode kit blocks that back-feed, ensuring each side flashes independently as intended.
• Required for Single-Indicator Dash Motorcycles: Metric motorcycles that share one indicator light for both left and right turns need this kit to function correctly after an LED swap — it's not optional on these bikes, it's necessary.
• Recommended When Replacing Incandescent Signals with LEDs: As the manufacturer notes, this kit is specifically recommended any time stock incandescent turn signal bulbs are swapped out for LED signals, making it the natural companion to any LED turn signal upgrade.
• One Kit Per Bike: A single Kuryakyn 4709 diode kit handles the entire motorcycle — no need to purchase multiple units.
• Load Equalizer Type: Classified as a load equalizer, this kit addresses the electrical load mismatch that commonly occurs when low-draw LED bulbs replace higher-draw incandescent bulbs in older motorcycle wiring systems.
• Simple Installation Process: Installation involves disconnecting the battery, locating the turn signal wiring, and integrating the diode assembly — a straightforward process for anyone comfortable with basic motorcycle electrical work.

Specifications

• Brand: Kuryakyn
• Part Number: 4709
• SKU: KUR4709
• UPC: 191209002145
• Type: Load Equalizer / Diode Wire Assembly
• Proposition 65: Yes

Fitment

The Kuryakyn 4709 Diode Kit fits all metric motorcycle models equipped with a single turn signal indicator bulb on the dash. If your motorcycle uses one shared indicator light to represent both left and right turn signals — common on many metric bikes — this kit is required when installing LED turn signals. It is not intended for motorcycles that have separate left and right indicator lights, as those bikes do not experience the same back-feed issue this kit solves. When in doubt about whether your specific bike needs this kit, reach out to the ThreePiece.us fitment team before ordering.

Why Buy from ThreePiece.us

• Free Shipping on Every Order: The Kuryakyn 4709 ships free — no minimum order required.
• Expert Fitment Support: Not sure if this diode kit is right for your motorcycle's turn signal setup? ThreePiece.us has a knowledgeable team ready to help you verify compatibility before you buy. Call or email to get personalized guidance.
• Affirm Financing Available: Spread the cost of your motorcycle accessories over time with flexible Affirm financing at checkout.
• In Stock and Ready to Ship: This is a regularly stocked product — no waiting on special orders.

Frequently Asked Questions

Do I really need this diode kit when installing LED turn signals?

If your motorcycle has a single turn signal indicator light on the dash (one light shared for both left and right signals), then yes — this kit is required. Without it, power will back-feed through the indicator bulb and cause all turn signals to flash at once rather than one side at a time.

How many kits do I need for my bike?

One kit is all you need. The Kuryakyn 4709 is designed to handle the full motorcycle — front and rear turn signals — with a single kit.

What does the installation involve?

Installation requires disconnecting the battery first, then locating your turn signal wiring to integrate the diode assembly. The included instruction sheet (documented as part number 4709-21MC-0911) walks through the steps. Basic familiarity with motorcycle electrical work is helpful.

Will this work if my bike has two separate turn signal indicator lights on the dash?

This kit is specifically designed for motorcycles with a single (shared) turn signal indicator. If your bike already has separate left and right indicators, the back-feed problem this kit solves typically does not apply to your wiring setup.