Modern Vespa

I have a faded anti freeze/rubber smell after riding for a while my GTS. I have looked everywhere and can't find any trace of a leak. Although I did have to add some antifreeze the other day because it was low. I just don't see anything. (South Florida)
Thanks

how's the oil look?

it's not coming out of the muffler is it?

Oil is good. No, it's not coming out of the muffler

A puff of white 'smoke' when you first start is a good indicator of a split in the intake (uh-oh, new head required) or hopefully just a compromised head gasket.

There may be no other indication until it gets worse, when starting becomes hard. BTDTGTTS - mine was a split intake tract in the head.

I would clean the engine and then carefully inspect all hose clamp areas, thermostatic housing, bleed screw areas. I would think if getting the smell the coolant is hitting a hot part of the engine and vaporizing. Of course, if a gasket or head failure, it would be thru the exhaust system.

I did read someplace, perhaps on this forum, of cleaning the engine and after dry, dust with baby powder/talc and this will help reveal any small leaks. Never had to try that myself.

Isn't a rubber smell normal? (I hope!)

You ran over a skunk