VT#: 11-9721
Wiseco piston set is .010 oversize and is for 3-3/16" bore . Piston set has a compression of 10:1 and includes rings.
**NOTE: Run engine at moderate speeds for at least 500 miles, avoiding excessive running in lower gears, in order to properly break-in new pistons and rings.
XL Sportster® 1972-1985