Oil sump with site glass for the the Vespa GTS NON-HPE models.

If you ride at high speeds for extending periods of time you may have noticed your HPE engine burning a bit of oil, with this you can easily check the level before you take off in the morning.  Comes with a new gasket.  Piaggio part number 846096AL

When the engine is dead cold and on level ground the sight glass should be about half full.