Oversized pistons

[asdfg]

If one of my pistons has cracked badly and I want to get a new one do I need to get an oversized one? im not worried about performance just want it to go cheap as possible. will a new standard sized piston fit in without boring the cylinder, cheers

[davereid]

Thats really tricky... you have to consider the bore, not the piston. Measure it to find your answer.

ie... we want a hole... but we cant buy one... next best is we buy a drill.

[zooter]

It's unlikely that your cylinder bore survived a piston disintegration but you never know your luck. If the bore only needs a hone you might get away with a stock size piston.
What is more important is why the piston blew in the first place. Something is likely to blame that needs fixing.