125-200cc rear wheel spacer question

um ok this is a bit stupid but I punched out the rear bearings on my 13 wr165(first time ive done bearings) no probs & am gonna put new ones in tomorrow. have them in freezer, seals picked & chockas full of grease ready to go but I forget which way the central spacer goes in. it has a small bush on one end that looks rusted onto spacer & I cant bloody remember which way it goes(bush at single bearing end of hub or double bearing end as in drive side of hub)? anyone know & does it matter? what does that bush do exactly? thanking yall

Im assuming its not dependent on orientation i would put the bush in the side you plan to drive the axle in from all im thinking is it centralises the spacer so it doesnt drop an make putting axle in a nightmare.

But Ive been wrong before.

Juicypips has it fairly correct. Distance spacers often have a collar or something on them to help center the collar. The hub will be narrower on the end that the collar-side of the distance spacer goes towards. Ultimately it really doesn't matter, though. If you get it in backwards, it will still distance the bearings properly and prevent them from being side-loaded.

sweet gents thanks for replies as usual. here goes my first attempt at installing bearings

Heat the hub with a hot air gun and they just push in with your fingers, No pounding needed !