I wanted to let everyone know that adding a secondary smartkey to your new venture can be easily done by yourself for a reasonable cost.
I researched the part # needed via Yamaha's parts website. The replacement smartkey is part # 2DF-86261-00-00. It is #36 on the parts diagram https://www.shopyamaha.com/parts-catalog/parts/street-mcy?nw=yamaha-motor-company#/Yamaha/STAR_VENTURE_-_XV19FJGY_-_2018/ELECTRICAL_2
I found it online for $170 shipped. It was backordered for a bit, but I finally received it yesterday. I followed the procedure from the service manual that is also posted in this forum for adding a smartkey. Now I have 2 working smartkeys!
I like to have a backup key for long trips just in case I lose one. I haven't yet lost one but you never know. When I had a Harley I would just remove the battery from the fob of the spare key. With the Venture, I will just turn off the smartkey that is the spare. By just turning it off I won't have to go through the hassle of opening the smartkey and removing the battery.