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The stock blinker relay is designed to work with traditional incandescent light bulbs, not LEDs. It needs a resistance load to operate properly. That is why when installing LED turn signals without changing the relay, resistors must be included into the wiring.
www.motorcycleid.com
Welcome to the site!
The stock blinker relay is designed to work with traditional incandescent light bulbs, not LEDs. It needs a resistance load to operate properly. That is why when installing LED turn signals without changing the relay, resistors must be included into the wiring.

BikeMaster® 266242 - LED Turn Signal Resistors
Universal LED Turn Signal Resistors - Part Number 266242 by BikeMaster. Available in Lighting Department at www.motorcycleid.com