No, nothing that adventurous.
I don't know where the dividing line between an over-bore and big-bore is, but basically a big-bore kit exists to increase displacement/power. An over-bore is simply a maintenance issue still leaving the engine operating within original manufacturer's specs.
In some cases, new cylinder sleeves are required to house the new larger pistons. These set-ups require the old sleeves to be pressed out of your cylinder block, the block itself is then bored, the new sleeves pressed in which are then bored/honed to match the pistons being used.
I just had 59mm pistons installed in my CB550F. This amounts to a 0.5mm over-bore. This is right in the middle of the Honda specifications for over-bores. No real change in displacement.
With a big-bore kit, you can take a CB500 and turn it into a 600cc bike. A 750 can become over 1000cc's in the extreme (requires modifications to the cylinder block/head beyond larger holes).
Whatever size you go to, you need an experienced machinist with the right equipment to do the work. Not something to be done on a drill-press in your basement. The measuring instruments alone can cost as much as your bike.
