10-19 Yamaha YZ450F YZ 450F 99mm 470cc Big Bore Cylinder Works 13.5:1 CP Piston CRF250RX Larger diameter non-threaded shoulder

Larger diameter non-threaded shoulder

nonroad competition use only and is exempt from applicable EPA and California emissions regulations

SKF crank bearings

backed by a lifetime warranty

10-19 Yamaha YZ450F YZ 450F 99mm 470cc Big Bore Cylinder Works 13.5:1 CP Piston CRF250RX Larger diameter non-threaded shoulderMX1068, MX1069, MX1070, MX1P70, MX1070, 01. 2444. A, 21005 K02, 21005 G01, 21005 G02, 23655, 291510, 324911, 324913, 324914, 40001M09700, 40002M09700, 40111M09700, 40121M09700, 20005, 20005 K01, C3395,33D 116A0 00 00, 33D 11631 00 00, 333D 11603 00 00, 33D 11633 00 00, 93450 19052 00 BPRATV CP Carrillo Custom Piston Kit '10 19 Yamaha YZ450F 13. 5: 1 99mm Big Bore 470cc Piston Kit FITS ALL 2010 2019 99mm Big Bore Cylinders Including: Athena, Cylinder