How to Install a Sequential LED Turn Signal Kit on Your Bike

Quick answer

To install a sequential LED turn signal kit, first disconnect your battery, then remove the stock signals and mount the new ones. Next, connect the wiring using OEM plug adapters or splice connectors, and if needed, install load resistors or an LED flasher relay to fix hyperflash. Finally, test all functions before reassembling.

Prepare your bike and gather the right tools

Before you start, park your motorcycle on a stable surface and disconnect the negative battery terminal to prevent electrical shorts. Gather essential tools: a socket set, hex keys, wire strippers, electrical tape, and zip ties. If your kit includes OEM plug wiring adapters, you may not need to cut or splice wires, which simplifies the process. For the Yoshimura Type A Sequential Signal Kit (product ID 2721759), the kit includes Yoshimura signals, OEM plug wiring adapters, and a powder-coated stainless steel mounting bracket designed for V2 Fender Eliminators. This means you can often achieve true plug-and-play function if your bike model requires it. However, always check your specific motorcycle's wiring diagram to confirm compatibility.

Remove the stock turn signals

Depending on your bike, you may need to remove fairings, the seat, or the fender eliminator to access the stock signal wiring. Take photos before disassembly to help with reassembly. Unplug the stock signals from the main harness. If your bike has a fender eliminator kit installed, the stock signals might be integrated into it; in that case, you may need to remove the fender eliminator first. Be gentle with plastic clips, as they can break easily. Set aside all hardware in a magnetic tray to avoid losing bolts.

Mount the new sequential signals

Attach the new signals using the provided mounting bracket or hardware. For Yoshimura kits, the stainless steel bracket is designed to fit specific fender eliminators, ensuring a secure and clean installation. Route the signal wires along the same path as the stock wiring, using zip ties to secure them away from hot or moving parts. Avoid overtightening mounting bolts, as this can crack the signal housing or damage the bracket. Check that the signals are positioned symmetrically and angled correctly for visibility.

Connect the wiring

If your kit includes OEM plug adapters, simply connect the signal wires to the bike's harness. If not, you'll need to splice the wires: strip a small section of insulation from both the signal and bike harness wires, twist them together, and secure with crimp connectors or solder. Use heat shrink tubing to protect the connections. For sequential signals, ensure you connect the correct wires for power and ground; typically, the black wire is ground and the colored wire is positive. Double-check your connections against the kit's instructions or your bike's service manual. A common mistake is reversing polarity, which can prevent the signals from working or damage the LEDs.

Address hyperflash with load resistors or a flasher relay

LED turn signals draw less power than stock incandescent bulbs, which can cause hyperflash (rapid blinking) or a bulb-out warning. To fix this, you can install load resistors in parallel with each signal, or replace the stock flasher relay with an LED-compatible one. Load resistors mimic the resistance of incandescent bulbs, but they generate heat, so mount them on a metal surface away from plastic. Alternatively, an LED flasher relay is a cleaner solution that plugs into the stock relay socket. If you're unsure which method to use, consult your bike's wiring diagram or a professional. Note that some sequential signal kits include resistors or a relay; check your kit contents first.

Test and reassemble

Reconnect the battery and test all signal functions: left, right, and hazard lights. Ensure the sequential sweep works correctly and that the signals blink at a normal rate. If hyperflash persists, recheck your resistor or relay installation. Once everything works, reassemble any removed fairings, seat, or fender eliminator. Secure all wiring with zip ties and ensure no wires are pinched or exposed. Take a short ride to confirm the signals operate reliably under vibration and varying conditions.

Step-by-step installation guide

1. Disconnect battery and prepare tools: Always disconnect the negative battery terminal first to prevent electrical shorts. Gather socket set, hex keys, wire strippers, and zip ties. Check if your kit includes OEM plug adapters to avoid unnecessary splicing. Checkpoint: Ensure you have all necessary tools and safety gear before starting.
2. Remove stock signals: Remove fairings or fender eliminator as needed to access stock signal wiring. Unplug connectors and set aside hardware. Take photos for reference. Checkpoint: Label or photograph wiring to ensure correct reconnection.
3. Mount new sequential signals: Attach signals using provided brackets or hardware. Route wires along stock paths and secure with zip ties. Avoid overtightening bolts to prevent damage. Checkpoint: Verify signals are symmetrical and angled for maximum visibility.
4. Connect wiring: Use OEM plug adapters if available; otherwise splice wires with crimp connectors or solder. Ensure correct polarity: black to ground, colored to positive. Use heat shrink tubing. Checkpoint: Double-check connections against instructions; reversed polarity can damage LEDs.
5. Install load resistors or LED flasher relay: If hyperflash occurs, install load resistors in parallel with each signal or replace flasher relay with an LED-compatible unit. Mount resistors on metal surfaces away from plastic. Checkpoint: Test signals; if hyperflash persists, recheck resistor or relay installation.
6. Test and reassemble: Reconnect battery and test left, right, and hazard functions. Ensure sequential sweep works and blink rate is normal. Reassemble removed parts and secure wiring. Checkpoint: Take a short ride to confirm signals operate reliably under vibration.

Product facts

• Type A Sequential Signal Kit for V2 Fender Eliminators: Sequential lights offer movement so other riders and drivers can possibly see you better. Our Sequential Signal kit for V2 FE kits include Yoshimura signals, with OEM plug wiring adapters and an intelligently designed, powder coated, stainless steel mounting bracket. All necessary components for true plug-and-play function are also included if your bike model requires it. This kit simplifies installation with plug-and-play wiring and a durable bracket, reducing the need for custom fabrication and improving visibility.
• Type D Sequential Signal Kit for V2 Fender Eliminators: Sequential lights offer movement so other riders and drivers can possibly see you better. Our Sequential Signal kit for V2 FE kits include Yoshimura signals, with OEM plug wiring adapters and an intelligently designed, powder coated, stainless steel mounting bracket. All necessary components for true plug-and-play function are also included if your bike model requires it. The Type D kit offers a similar plug-and-play solution with a different signal style, allowing you to choose the look that matches your bike.
• LED Front Turn Signal Kit: In the wake of the success of our well respected Fender Eliminator Kits, Yoshimura is now offering high-end LED turn signal kits. We have two kits, a front and a rear. Both the front and rear are two-wire kits and can be mounted on most of today's motorcycles. Our Front kit contains: A CE certified set of Two-Wire LED lights with a clear lens in a rubber insulated, anodized black aluminum body Mounting hardware. This front LED kit provides a high-quality, durable option for upgrading your front signals, with a simple two-wire connection that works on most motorcycles.