Changing my oil today, I noticed that the new OEM crush washer for the 17mm drain plug, P/N GU10528900, does not have the nifty little rubber gasket in the center of the washer like the one coming off of the bike. I guess Piaggio is saving money by omitting the rubber center (while charging $5.25 for the washer ). That rubber center gasket is such a good idea! Hmmmmm. What’s up with that?!? I gave it a few good tugs with a 6” socket wrench to seal it. Hopefully it will be as leak-free is the cool rubberized old style.
old style is on the left, new style is on the right: