Those tires will not last very long and the handling will really suck if you inflate to the factory specs. If you can't find the Roadtrek label inflate to 60-65 front and 80 rear.
If you choose not to believe what's mostly posted on this thread, call a Roadtrek dealer or Roadtrek.
2000 Roadtrek Chevy 200 Versatile
'15 Kawasaki Versys650LT
'98 Kawasaki KLR650