Seller notes

Vertex Cast Replica Piston Kit Fits:1999-2022 Yamaha YZ250 66.40mm bore (Stock) 2016-2022 Yamaha YZ250 X 66.40mm bore (Stock) *Please measure your cylinder bore before ordering* All piston skirts are coated with a hi-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeCast Replica piston kits are gravity cast aluminum alloy (not forged) with 18% silicone content, which produces an extremely light but very strong pistonAll pistons are heat treated with a T-5 harde...

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