Ahh, engineering at work. I had a look at how the kickstand was mounted, and it looked like the weakest part of the setup was just above the base of the stand. (est dia 0.5") According to Yamahas website, the dry wieght of the bike is 375lb. Using the formula S=F/A (stress = force/ area) Only 1.9ksi of pressure is exerted. Even a low grade cast iron (assuming no defects) can withstand appx. 40ksi of direct pressure. So theoreticaly your kickstand can withstand the wieght of the bike; however, bending still may occure of the bike is not held directly above the vertical of the kickstand. I hope this has helped or possibly reasured non believers and i hold no responsibilities for any damage(s) that may occure.
Sorry, little type-o there.