Jez... theres a lot of complex proceedures going on in FBD cellar.
one million mile from my Lawn Mower Theory.
No voodoo here. The YS's are just ran dry and thats that.
Back in the two stoke days, ran dry and a squirt of ARO.

People worry about rusting the bearings/ rings.
I replace them every season anyway.
Never picked out any rusted ones because of my simple winter storage method.

Don't make the problem bigger than they are.
They're little hobbly motors from toy airplanes... treat them as such.