Cylinder Works YZ 250 1999-2024 Standard Bore Cylinder Kit 20009-K01

When your YZ 250's cylinder shows signs of wear—scoring, reduced compression, or lost power—a full rebuild with quality components is the most cost-effective path back to peak performance. The Cylinder Works Standard Bore Kit delivers everything you need in one package, eliminating the guesswork and sourcing headaches. You get a U.S.-made cylinder with Nickel Silicon Carbide plating paired with Vertex pistons, all engineered to work together from day one.

This is a direct bolt-on solution for 1999-2024 YZ 250 models, meaning no additional machine work or custom fabrication required. Installation is straightforward enough for experienced DIY mechanics, though professional assembly is always recommended for optimal ring seating and longevity. The kit includes everything you need: cylinder, piston, rings, wrist pin, clips, and gaskets.

• Fits: YZ 250 (1999-2024)
• Standard bore diameter
• Nickel Silicon Carbide plating
• Vertex piston included
• Complete gasket set included
• Bolt-on installation
• Made in U.S.A.
• MPN: 20009-K01