i have rebuilt a 2 speed before and it was pretty easy to get seals and bearings for it. i wound up trading that bottom end off for a vespa engine.
i can get you bearings if you crack the case and give me the numbers on the sides.
hope you have the tranny locking tools for the 2 speed.
also, when taking off the first speed gear that funny nut
if a reversed thread.....lefty tighty, righty loosey.
i have the clutch locking tool and the 2 speed puch
rebuild manuel if you have any questions. just mail me.
also have the bearing pullers for both the 1 speed and 2 speed
i like the 1 speed engines better. less complicated