Piston ring kit Stock size  1x (2 NEEDED)

Buell XB 2003-2010 ,  XR1200 2008- 2012 and Sportster 2004 -up 

stock size replacement piston ring kit for Oem pistons 3,5  inch bore 

replacement for OEM 21948-02

top ring 1,2 mm think , 2e compression 1,5 mm thick , oil rings 2,5 mm thick

set is for 1 pistons !

please note piston ring gap needs to be checked ! and if needed set 

Hastings, the OEM supplier to Harley-Davidson, manufactures these rings. They are the same piston rings that are shipped with every new motorcycle as well as sold by Harley's parts department. All ring faces are pre-lapped for easier seating. The exclusive Flex-Vent oil control ring is the easiest of all designs to install because there are no right side ups or side downs. The Flex-Vent ring also assures a uniform pressure on the cylinder wall contacting rails and a positive oil control. Its open design affords 200% greater drainage capacity than conventional designs.