how do I know the capacitators are ok?

[Frankentruck]

Motor has been cleaned up, decapitated and put away. The capacitors are in my pile of unused capacitors.

You can't use an reversing esc with the electrolytic caps.

I tried that once. The capacitor exploded.

[Lowgear]

When I was in electronics class in high school the teacher would put a capacitor in the end of an extension cord, put that end into a metal garbage can, and plug the other end into an outlet. Bang!

[GoMachV]

It's weird that Kyosho cars came with polarized caps and mechanical speed controls with reverse. Is it possible that the motor drew all the current so the cap didn't see any?

[1911Colt]

When I was in electronics class in high school the teacher would put a capacitor in the end of an extension cord, put that end into a metal garbage can, and plug the other end into an outlet. Bang!

Rogue elements in my "radio and TV repair" class would charge large electrolytic caps and toss them to people.

[1911Colt]

It's weird that Kyosho cars came with polarized caps and mechanical speed controls with reverse. Is it possible that the motor drew all the current so the cap didn't see any?

Hmmm, interesting. Are you sure they were polarized? There were(are) non-polarized aluminum can-style capacitors. They look pretty much the same but without the + or - markings on the shrink wrap.

[GoMachV]

Very possible, I don't have one here to look at. That would make the most sense. I didn't realize there were non polarized can style caps