These S&S 1250cc conversion pistons for 1986-'21 HD® Sportster® Models increase the displacement of 883cc and 1200cc engines to 1250cc at 11.2:1 compression. May be used with stock 1200cc cylinder heads, but S&S CNC ported heads are recommended. Stock 1200cc cylinders and 1986-'2003 883cc cylinders may be bored to accept the 3-9/16" bore 1250cc pistons, but 2004-'16 883cc cylinders may not be used. Also available in a cylinder and piston kit.
*This kit is not compatible with XR1200 models*
This product is intended only for closed course competition use and is not legal for sale or use on CA or EPA pollution controlled vehicles.
883cc heads may not be used.