I currently own and use my fully electric Zero SR motorcycle for daily commuting. It's obviously much quieter and somewhat cleaner than a traditional ICE motorcycle but I would think motorcycles in general are cleaner than traditional vehicles (SUVs, Pickup Trucks, etc.). Just like any motorized vehicle however, you still deal with brake dust, tire dust/shavings, emissions, and other vehicle waste (like tire disposal or motor oil disposal) but on a smaller scale I think.
I reside in the US, specifically in a southeastern state, where public transportation as well as pedestrian infrastructure is absolutely abysmal and/or non-existent, in my opinion. I try to make the best of the situation by limiting my method of travel to my electric motorcycle where possible. I would prefer to walk to places if I could, but in most cases, I just think it isn't feasible or safe where I reside due to the vehicle-centric civil design of where I reside.