PISTON KIT 78-86 KX250 71.00, WISECO 439M07100 KAWASAKI

Part no 56-W439+1.00.WI (phoenixmotos.com)
Wiseco 71.00mm piston kit Application KAWASAKI KXT250 A1 Tecate Thru to 87 models
(Wiseco part no 439M07100)