I could be wrong but I think tires wear quicker on low psi vs high psi. Lower psi give more grip though. If I were to guess your thought is to run higher psi to try and counter your extra weight, correct? That seems like a good thought to me. I would probably lower to 35 or so though. Running asphalt the temps will increase and cause the tires to inflate. Most all MC tires go bald in the center first, unless your corner as much as you go in a straight line.
I only run up in the 30's if I only plan to run asphalt. Most of the time I'm in the low 20's. Upper teens if I'm doing mostly all gravel.
Kawasaki KLR650 - Adventure Lite
Tagged KTM250XCF-W - Rocket
Tagged KLX300 - Trail Tractor
'84 XR250R - Retro Ride
RMZ250 - Dirty
CRF80 - Kids
CRF70 - Kids