While we are on the topping of flopping. Maybe this has been covered extensively elsewhere, but what should be done before attempting to restart a P500 after flopping on it's side or a rollover? I assume since the power train is pretty much straight from a 4 wheeler it should keep most of the fluids and lubricants where they belong? Any vent lines that need to be purged? Do you need to pull the spark plug and crank over several times before attempting to start? Does it make any difference if the sxs is righted in under 2-3 min or hanging out in a precarious position for 20-30 min before able to be back on all four?
Those are excellent questions.
My ATVs have never spent more than a minute sideways or upside-down (my old Tri-moto 125 was a 2-stroke, just needed to be sure the oil injection tank pickup was right side down). My big motorcycle (BMW R1100GS) has a wet sump, so whenever I had it on its side for more than a couple moments, I let it sit on it's kick-stand or center-stand for a little while. The R-1100 engine sump has a sight glass, so you can actually watch the oil fill back up if it had, say, filled up the left side cylinder. The R-1100 is air/oil cooled, so I didn't have to worry about coolant.
The Pioneer 500 is a bit of an odd duck. It has a "semi-wet sump." This is confusing. It's also water cooled. So long as the coolant tank didn't drain dry while it was upside down, and there was no damage to the cooling system, I don't think tipping or rollover would be much of a problem. Even if the tank was empty it's unlikely you'd run dry and overheat if you turned around and headed home.
Personally, if I were to roll my P-500 today, likely with my a fore mentioned septuagenarian passenger aboard, the very first issue would be to ascertain possible injury. Then right the machine if I could. Then, assess damage. Then, take a breather, and thank my lucky stars. Maybe by then fluids would have had a chance to return to normal, and I'd check them. Obviously before I tried to start the machine.
I know so many would be eager to tip the thing back on its wheels and roar away. I was never of this school of thought. Do it right once. Half-assed and too, er, fassed (alliteration matters!) and you'll find yourself with more time and treasure lost.
Erm... "... the topping of flopping." Was that on purpose, or a happy accident?