Final drive seal internal v external

[phattanglo]

I'm about to rebuild my 2012 125 and I would appreciate some  feedback re the final drive oil seal.
Should I put another sealed bearing and internal seal in or is it worth blocking the little hole in the housing and fitting an open bearing and external seal.
My worry is that after only 8k miles from new the old sealed bearing was completely dry barring a bit of black sludge.
Also if the consensus is for an external seal, what do I block the little hole with?

[mijapxman]

I hate those internal seals and always change to open bearing (open,at least on gearbox side) external seal, self tapping screw and araldite works.

Mij

[phattanglo]

Cheers Jim, just to be sure for a 2012 px what dimension seal do I need please.

[phattanglo]

Yeehah I've just realised the seal and bearing I've already got are external and the little stainless self tappers I got for the brake back plate fit the little hole.
So Jim are we talking ordinary Araldite?
On the external seal am I right in thinking its the back of the hub that forms the seal rather than the drive shaft

[mijapxman]

phattanglo, you can use any epoxy that's good with oil and petrol or Jb weld works.

The seal should be for a 30mm hub( 30mm hole in center of seal),slide the seal onto the hub before you fit it in the case and you will see how it seals, after you see how it seals remove the  seal and fit it into the case.

Seal size here 👇

www.ebay.co.uk/itm/Vespa-30mm-Rear-Hub-Oil-Seal-PX125e-PX200efl-Size-30-47-6mm-/252375102570

Different seal size here 👇

www.ebay.co.uk/itm/VESPA-PX125-PX150-PX200-T5-P200E-30mm-REAR-HUB-OIL-SEAL-30-x-47-x-7/152474288326?hash=item23802d00c6:g:DpAAAOSwdGFYynll
 
Not sure what size seal would be best in a 2012 engine? The one ending in 6mm or 7mm?

more reading here 👇

modernvespa.com/forum/topic95600

Jim☺