Do I Need to Rebore My Engine?

Reboring an engine is necessary when the cylinder wall is: Damaged more than honing can resolve. (Deep scratches / marks) Un-round, or oval (this can be caused by overheating)

How do I know if I need to bore my cylinders?

Damaged piston in any way may be reason enough to re-bore your cylinder. Vertical scratches that you can feel on the cylinder wall is reason enough to bore your cylinder. Any piston seizing is a reason to bore your cylinder. Any apparent piston damage or vertical lines are an indication that a cylinder should be bored.

When should I Rebore my engine?

After wear or tear, or excessive usage, reboring is required when the cylinder is damaged. If the cylinder wall is damaged, larger size pistons can be used.