I have a 1974 XL125, that has needed an overbore/hone. I have taken it to nearly 0.50mm over (waiting til i get piston and rings to match to before finishing), and things are looking good now.

What I was wondering was if, now that I'll be at 56.5mm bore, I can use rings/piston from a 76+ bike? They are much easier and cheaper to find. I know the wrist pin is the same, but can anyone confirm deck height for the 124cc jug on the later bikes? What about connecting rod small-end width? Will this piston crown work with my K0 head and 122cc overbored jug?

Thanks all!