I replaced the original painted bits on my 2012 with blue ones when the Stevio first had that color option. A few years ago three bubbles began growing on the tank. One on each side under the Moto Guzzi emblem. One side 3"×4" progressing toward the front of the tank, the other side has a 7 1/2" × 3" progressing towards the back of the tank and a 1 1/2" diameter one on the flat just behind the small wind deflector top bolt. I had a similar problem with some of my Buell tanks but am curious if it has happened much with MG's. Thanks