Scrounging around the interwebs for a way to pull the old bearings from an E-bay cast front wheel and spending less than a mechanic charged me for the rear, I found a clever website that offered 2 ways to do it:  $2 solution or a $4 solution. I chose to spend $2  !!
https://www.instructables.com/id/2-Motorcycle-Wheel-Bearing-Puller/

Richer people can spend$4 !
https://thumpertalk.com/forums/topic/1245941-diy-bearing-puller-for-under-1/
(prices in can$)
Worked like a friggin' charm!
cheers!  

Totally cool & simple tool.  Thanks

You want that spacer pinched between the inner races of the two bearings.  If the spacer is shorter than the distance between the lands in the hub you will preload the ball bearings.