Sorry, I hit the wrong number even tho 25.4 is a real oil seal size.
There is NOT seal issue.
Any honda dealer will order the seals for you until 77 gets them instock.
The vario side seal is a standard honda made seal for/from honda mopeds.
hobbit, pa50I/II, nc, nx50m, 15x25.5x7 - 91201-147-003
Team 77, camino NT 17x25.5x7 - 91201-GB7-631 (Double Lip)
You need one of each size for your crank upgrade.
Some of you may have had this happen to you. The vario seal popping out. Make sure you have the seal free of oil on the outside of the new seal and case and use some thread retainer (green stuff). Use a q-tip to apply a small amount of oil to the inside of the seal this will kept the seal from burning up or smearing maybe even tear the sealing lips.