Ready-made wiring harness and relay kit makes it easy to add relays to a motorcycle headlight. Adding a relay can improve headlight output, reduce load on switches and allow higher wattage bulbs to be ...

Motorcyclists may find that adding a headlight relay and a wiring harness which brings power directly from the battery to the headlights will increase the brightness of the bulb, because wiring ...

Offered by Reenmachine, the package consists of a pair of Hella high-performance halogen H4 headlights and a modern high-output, relay-driven wiring harness. The key to the system is a harness ...