Wiseco piston set is .020 oversize and is for a 3-3/16 bore. The Piston set has a compression of 10:1 and includes rings. **Note: Run the engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears to break in new pistons and rings appropriately. *NOTE: The center of the wrist pin to the top of the dome measures 1 -7/8, and the center of the wrist pin to the bottom of the oil land measures 7/16.
- 1972 / 1985 XL