Just because we're doing big bore kits it doesn't mean we'll have XR440Rs! I know Honda makes oversized piston and rings just for this kind of scenario (the scenario being 2 ADVers screwing up their engines before buying a new one).
I'll take my top end to lindsay machines and put it back in the bike. I think that engine has a lot to give still. I doubt it'll add that much power as to eat the transmission, I doubt it'll add any power at all, actually.
As long as I am the big spoon!!!