Everything I see is West Coast.

Did you see this one on Craigslist in Kernville/Bakersfield, CA area: https://bakersfield.craigslist.org/for/d/kernville-yamaha-riva-scooter-125cc/7854641887.html

Or this one in the Echo Park / Los Angeles area: https://losangeles.craigslist.org/lac/mpo/d/los-angeles-yamaha-riva/7864964766.html

Or this really, really cool-looking one in Oakland: https://sfbay.craigslist.org/eby/mcy/d/oakland-1985-yamaha-riva-180/7863873317.html

Or this one for parts in Seattle: https://seattle.craigslist.org/see/zip/d/seattle-for-parts-yamaha-riva-xc180n/7864979997.html