over size rings and pistons?

[STreetKArt]

how can i tell if i need a larger ring and piston size than stock
thanks everyone

 

[modelengineer]

If you re bore the engine, you need a larger ring and piston. Otherwise, you don't. If a stock piston and ring leaks oil/compression, you need to re bore and get a larger ring and piston.

 

[Kenny_McCormic]

The piston must fit the bore with less than .002" to spare.