PIAA 004XT bulb replacement
One of the bulbs in my 599′s running lights burned out at the end of last season. They are PIAA 004XTs and do a wonderful job filling in more light when riding, with the additional benefit of increasing conspicuity.
After some digging I found they can take regular replacement H3 bulbs, so I acquired two and replaced them. Here are some photos of the job, so others can see how it’s done. Click the photos for full sized version.
Start by gently prying at the drain hole with a screwdriver or appropriate tool. The lens assembly is held in by three plastic clips that just pop out. Here’s one:
Once out all the way, pry back on the spring shown here on the left. This will allow you to rock the old bulb out:
Then, wiggle the light out:
Replace the bulb, making sure not to touch it with your fingers. Reinstall the wiring and press the lens assembly back into the housing, making sure the plastic clips all properly seat.



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