This wiring harness is only required if you are having problems with
1. HID flickering
2. HID not turning on
This happends on cerain models. This wire harness gets power directly from the battery instead of your connect by use of a relay. This product is not required for most bikes/atv's.
This products wires may need to be shortened for most applications as its very long (originally designed for length of a vehicles hood.

The wire relay harness is not recommended for bikes since it is a type of kit that is only recommended to motorcycles with problems of HID flickering or HID not turning on, this wire gets power straight from the batteries instead of the normal connections by the use of a relay. Wires in this xenon hid kit are meant of vehicles and not motorcycle because they are very long and designed for long vehicles. They are cheap and very affordable but when it comes to fixing it to the normal motorbikes one can decide to shorten the wire relay harness so that he can use it the motorcycle they form good headlights since their power is very vital when it comes to sue.