Yup, sounds standard to me.
small end bearing, head and basket gasket are exactly the same as a fizzy.
Never had my head of so don't know about rings and piston. Try ebay- a few American dealers; they have YF1 parts.
Will pop into the garage today and send you points gap, and spark plug grade.
Oh, a YG1 side casing will fit, although it will be metal and slightly plumber and rounded