Holy shit I’m still alive. So anyways I did what I do best and tore apart something that really didn’t need taken apart.
First thing: according to this head gasket the bike has the same head stud pattern as Yamaha qt50, which the jug itself looks strikingly similar to! As I have it apart I’m going to take lots of measurements due the distinct lack of information currently available. Here’s some to begin with.
BOTH crank bearings are 6203 bearings.
BOTH clutch cover bearings are 6000 bearings.