Morimoto MotoCycle H4 Dual

Dual Output

Power Delivery: A relay harness is designed to deliver steady voltage to your HID ballasts directly from the bike's battery. Nobody likes a flickering headlight, so why risk it? Factory headlight outputs are really only designed to power a halogen light bub, not a HID ballast.

One of a Kind: The H4 Single-Lamp Motorcycle specific harness is the first truly high quality relay harness designed for retrofitting a single or dual headlight motorcycle with xenon projectors. We're proud to offer it!

What's the Difference: The wire lengths are designed to be more ideal for the layout on a motorcycle. Unlike a normal harness, which is designed for a car's engine bay that has to be modified, this one should be ready to go out of the box. 

Single Option: Each harness will power one HID ballast and one bi-xenon projector/bulb solenoid, perfect for a bi-xenon projector retrofit into a single headlight on your Motorcycle.

Dual option:  Each harness will power two HID ballasts and two bi-xenon projectors/bulb solenoids, perfect for a double bi-xenon retrofit onto a bike that used to have only a single or double H4 halogen headlamp.

Don't Skimp: As an important part of a finished headlight upgrade, don't skimp out when it comes to your wiring. The long list of features on the Morimoto MotoCycle Relay harness is easily worth the small premium over the eBay $10 special.

Work of Art: Aside from being a technical masterpiece, it's also a work of art. With its braided TechFlex insulation and clear relays mounted on orange bases, it will surely look factory-fresh routed through your fairings.



  • Harness: MotoCycle H4 Bi-xenon (Single or Dual Lamp)
  • Relays: Inline Morimoto Control Box
  • Warranty: Two Years


  • Ballasts: 35W, 50W
  • Original Bulb: H4, 7" Round, 5-3/4" Round
  • Projectors: All Bi-xenons


  • 1x Input Trigger: H4 Male
  • 1 or 2x Ballast Outputs: 9006 Female
  • 1 or 2 x Hi-Beam Output: 9006 Female
  • 1x 12V Power: Nickel-Plated Ring-Type
  • 1x Grounds: Nickel-Plated Ring-Type