Honda did not make it easy; I've now found 4 different housings and 2 different drivers, I can only share what I have:
The seal in between the gear box driver and your hub is 30mm x 42mm x 8mm. The company I use has 7mm thickness dual lip and spring backed.
The seal between the gearbox and the gear box driver is 27mm ID x 36mm O.D. and forget the thickness (5,6,7,8mm) but it can only be raised up a bit before
your seal pushes that drive towards the other side, you'll have less surface area contact.
^ I have seen that O.D. of 36mm and increases it to 40mm IF THE STEEL SLEEVE IS REMOVED out of the housing!! (I have found some gone...)
Now, the other style drive housing (which mainly I see with drum brakes) is different. It is 30mm I.D. (thicker driver), a 40mm O.D. and again the width is listed in the 1st line.
ALSO, that (lets call em o ring drives) have a different method of mating your drum to the hub and seal it. It uses an o ring 36mm I.D. x 42mm O. D. and 3mm wide.
To remove the pinion shaft, use a #29 drill bit (thats for an 8 - 32 " tap). Just hold the housing in soft jaws and use a punch to drive it out. Tap it 8/32 or MM thread for resealing. The o ring drives seem to have a setscrew and hat or cap on the bottom.
There is a knurled bushing, it's just driven in and has a thrust washer on the bottom (don't lose it), the bushing and the pinion seal is 4 or 5mm I.D. 15mm O.D. and 4mm thick or wide amd single lipped, no spring....
PLEASE DOUBLE CHECK OR ADD INPUT!! I'll try to get talp a talk on here later for pics. It's not on my phone....
Never pull on the top where that pinion shaft is sticking up, it will break.
P'S. It truly is tough for me to get to some parts, I have too much But that's why I may not respond to a PM until I know I have a few hours to try and help out.
All our government does is distract us while they steal from us, misspend our tax $ and ruin our country