Modern Vespa

Im sorry, I tried to search for it but I have no idea what this is called or what its for, can someone let me know? Its full of what im assuming is oil, but why? it was clear before and didnt have anything in it..now its yellow and full of liquid.

The bubble is just a reservoir for excess air filter oil. Just remove it, clean it out and replace. Completely normal.

From the Wiki:

FAQ: What's that bubble filled with oil?

Awesome! thank you! I totally searched for bubble too, oh well.
thanks for your help.

Well I'm glad someone asked the question because I had always wondering what it was.

The guys here on MV know everything!!

May also want to make sure you check what was collected in the bubble resevoir...oil run off from oil filter would be the obvious...but check and make sure it's not fuel...if it is you may want to dry out your air filter.

Fuel can get into your air filter if you overfill your fuel tank.

OK, I know I've overfilled it... once (maybe).

What do I need to do and where is the air filter?

Thanks,

-George

Thanks TB, I always overfill my fuel tank. maybe why my bubble is full.