Sounds like the belt may be too tight, along with the V-wheels. I have my v-wheels set so that I can easily spin them with two fingers, but one finger gets a little tougher.
Check out my belt tensioning video, I included a way to check belt tension with a 2x4, dowel, and gallon of water if you don’t have a good scale. X-Carve Maintenance/Troubleshooting Videos - Add Your Own!