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Cylinder Works Big Bore Kit Yamaha WR 450 F / YZ 450 FX 21-2023 YZ 450 F 2020-22
Cylinder Made in the USA by Cylinder Works. Piston kit made in Italy by Vertex. Gaskets made in the USA by Vertex. +2mm Big Bore Cylinder Kit.
13:1 Stock Compression Ratio. Includes: Cylinder, Piston Kit, and Top-End Gasket Kit. _gsrx_vers_625 GS 6.9.7 (625). _gsrx_vers_1730 GS 9.9.4 (1730).