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The JE single piston for 2019 Yamaha YZ250F is sized at 77 mm and specified with a 14.0:1 compression ratio, supplied as a single replacement. It provides the explicit bore size and compression spec needed for one-cylinder service or rebuilds on the 2019 YZ250F, helping technicians match sizing and restore proper compression during engine maintenance.
JE Pistons 2019 YZ250F 77MM 14 to 1 Piston Single
