To get the most out of your new bulbs or even stock bulbs try using headlight relays they will make any bulb shine brighter and take the load off of the stock wiring system. I got mine from
Eastern Beaver, "H4 single headlight relay kit" which has a couple of options choose the fairing mount which comes with longer wiring for the relays to be tucked behind the scops or near the ignition module. I have the short relays and let me tell you that stuffing the relays into the headlight shell is not fun but it can be done.
The setup of the relays are pretty straight forward:
1) Run the cabling along/ through the top frame rail towards the steering head (I followed the factory wiring path).
2) Now take the headlight apart, safely set the bulb aside while you snake the 2 bulb leads into the headlight shell. One lead plugs into the factory bulb lead to get switching signals from the bike and the second lead plugs into the headlight bulb where the factory lead used to. You will want to wait to reinstall the buld until you have the rest of the wiring situated.
3) Time to tend to the wiring! If you chose to get the longer relay leads this is where you will be happy that you did. Neatly lay the wires from the headlight shell next to the factory wiring and either tape or use your favorite wire bundling method. Tuck the relays in a location somewhat protected from moisture and secure (wire tie/ etc.). Continue carefully running the wire lead back towards the battery securing (wire tie/ tape) carefully.
4) Install the ring terminals onto the battery: positive (w/ fuse) to positve/ negative to negative. I had extra wire that I bundled up near the radiator overflow bottle, you may choose to cut the wire to length.
5) Once all the wiring is done, plug in and reinstall the headlight. Now try your new, much brighter headlight and reap the additional benefit of having the headlight elctrical load carried by the relays and not across the factory switches/ wiring.
Below is a picture of the headlight relay harness, shown with the preferred, longer fairing leads:
![H4F-HD-kit.jpg H4F-HD-kit.jpg](https://cdn.imagearchive.com/vmaxforum/data/attachments/29/29390-aeeda0deeea2f886cd7928647560bf1c.jpg)