Fitted from the factory, the BETA CYLINDER - KIT (OEM 046.11.002.00.00) is Beta’s original cylinder for the RR 50 2T ENDURO, RR 50 2T RACING ENDURO, RR 50 2T SPORT ENDURO, RR 50 2T TRACK MOTARD (2021–2026). It houses the piston and sets bore condition and compression. Re-bore or replace once the bore is scored or out of tolerance. Original