Smoke from under

[SOSFrider]

Hey everyone,

So I've been a happy owner of a low-maintenance 2005 GZ250 for over a year with no problems. However, I recently noticed a funny smell when I was riding and I'm noticing a bit of smoke coming out from the grey metal part under the gas tank. There's also some black stains on the same part but only on the left side. Any feedback on what this could be? I feel like smoke is never a good thing but maybe it's an easy remedy.

Any advice is appreciated. Thanks!!