Which spacers go where on 2650?

[SpEEdyBL]

I opened up the motor to clean the bearings and I forgot which spacers go where on the rotor. From the wear marks, it seems like the short spacer goes toword the ouptput shaft end, but it is hard to tell. I don't know if it is just me if the shaft sticks out longer than normal as it measures roughly 21mm from the mounting face. Also, where can I find replacement bearings? One of them seems a little grindy.

[Hockeyplaya20]

If i remember correctly, the front has the short spacer, the rear has the long spacer.
Bearings used are "Oversized ABEC-1 front and rear" i cant seem to find them online.

[blueb8llz]

how often do you guys change the bearings? i didnt even know we had to. do you guys oil the bearings too?

[SpEEdyBL]

The problem is the dirt tracks that I run on. Dirt seems to very easily find its way into the front bearing.