Tail light lens fading
Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
Updated:
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I extracted this information from Mark Etheridge of Moto Guzzi Classics off of the old Topica Loopframe_Guzzi news group (which has now moved to Groups.io).
If your tail light lens is faded, you can restore the color by boiling it in red RIT dye.
- Boil the dye (a concentrated amount).
- Submerge the lens for a couple of minutes...carefully monitor the progress as you don't want to destroy the lens.