Bore 70.75mm +75 Oversize Motorcycle Cylinder Piston Ring Gasket Kit For Honda AX-1 NX250 1988-1993 Fit For Honda AX-1 NX250 1988 1989 1990 1991 1992 1993 offroad motorcycles full cylinder piston ring gasket kit with 70.75mm +75 oversize bore specification machined +75 oversize piston rings match 70.75mm oversized cylinder bore to restore stable compression reduce excessive oil consumption comprehensive matched gaskets cover cylinder head, base sealing joints to coolant leakage after overbore rebuild hardness anti abrasion piston ring material withstands rough trail riding loads extends engine cycle oil composite gaskets maintain stable sealing under sustained engine operating temperatures