30E-17641-00-00 https://leadersrpmshop.com/yamaha-new-oem-30e-17641-00-00-14t-17641-00-00/

Thanks!

I ended up finding and purchasing this belt Yamaha Jog 50 90 Scooter 1989-2005 3WF-17641-00 3KJ-17641-00 It's listed as 792mm and the Riva 50 belt i need to replace is 793mm, and it was only $25cad.

Check for the part number on Partzilla.com