I haven't seen those, but an EX500 isn't very heavy so I don't think that, even if they really aren't "heavy duty" the 11/4 inch tubing is probably fine.
Just be aware that if your bike has a (gasp) MUZZY or other aftermarket exhaust, or you plan on getting one, unless it is a hi-mount like the one shown in the Black Widow Stand pics on their website, the rear stand will not work.
(I actually just have a chain hoist that I can use on any bike, so I can lift the front, rear or entire bike, since it will lift 1000 lbs.) Cost $35 and I have had it for 15 years.
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