Running the Vehicle while using an Air Compressor

The manual for my Slime portable Tire Inflator (mini electric air pump connected to the motorcycle battery) says "DO NOT run the vehicle while compressor is operating. Engine must be turned OFF".
It seems to me that it would be better for the motorcycle to be running so the battery is getting charged and also that I'd have a way to get going again in case the battery was drained too low to start the bike after filling the tire. Other than the risk of accidently knocking the bike into gear while working around the tires, what would be wrong with starting up the motorcycle before turning the air pump on ?

That's just there way of covering there butts if something goes wrong.
If it's in writing they are safe and can say we told you so.

I did not think there was any charge being done to a battery if the bike is just running at idle ?

For the most part the bike batt is not being charged till the RPM goes over about 2k or so.

boooya said:

That's just their way of covering their butts if something goes wrong.
If it's in writing they are safe and can say we told you so.

Click to expand...

Yup - exactly.

Your battery should be able to run the little pump anyway, without running the bike...
Or use a car battery - even one that's inside a car. Or run the pump directly off a battery charger (not a teeny one - check the amperage involved).
It's more like 3 grand plus, before most bikes are charging with any enthusiasm...
L8R