Join Date: Jul 2016
Location: Seattle, WA, USA
Yes, you can do motor swaps from 12 to 13 and back again but why go backwards? With a little work, you should be able to find a 1300 or a whole wrecked bike with a good motor. Go look thru Craig's List in major cities close to you first. Then look in the SunBelt all across the Southern Tier of the Nation where motorcycling is big like Miami, Dallas, Houston, Phoenix, LA, and especially the SF Bay Area.
If that doesn't get it, start working the entire nation. I live in Seattle but bought my '08 K 12 S in Minneapolis. It was worth it. I found a low miles well cared for bike owned by a middle aged professional engineer and it was the bare bones version I wanted.
You can work out shipping all across the nation and it's pretty reasonable especially if you aren't in a big hurry.