So the first two pics are the Varg with a 110/90 19 IRC M5B mounted and the last pic is the same tire though different size on my '23 KTM 300 130/90 18
Well just crazy tight IMO, I've had dozens of bikes over the years and I don't recall ever having such a tight gap... Just thinking possibly plugging up with mud/rocks I dunno probably not an issue......
while the tire does expand slightly at high speed it shouldn't be an issue just watch the black guard for damage/wear. my concern would be the lack of clearance for debris leading to a possible rear wheel lock up. i won't pretend to know the riding conditions where you live you should be o.k. if it is mainly sand.