YAMAHA ENGINE CYLINDER FOR 1987 YZ 125T MODELS. OEM PART NUMBER 2HG-11311-00-00. FRESHLY BORED. INCLUDED ARE AN OVERSIZED WISECO PISTON KIT (559P5) & VESRAH TOP GASKET SET. LONG AGO DISCONTINUED, THE PISTON ASSEMBLY HAS BEEN COSMOLINED INTO THE BORE FOR PROTECTION. SIMPLY WASH OUT THE COSMOLINE WITH SOLVENT/DEGREASER, AND ASSEMBLE. THERE SHOULD BE NO DISSAPOINTMENTS!! WE GENERALLY SHIP PURCHASED ITEMS ON MONDAY, AND THURSDAY. THANKS FOR LOOKING, AND "HAPPY MOTORING"!