Vertex Piston Kit (Cast BigBore) Yamaha YZ250 1999-2024

Cast-BB Cast piston in original OE form for big bore cylinder All pistons are heat-treated with a T-5 hardening and tempering cycle All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life Cast piston kits are gravity-cast aluminum alloy (not forged) with 18% silicone content, which produces an extremely light but very strong piston Big Bore pistons increase engines displacement, torque, and peak horsepower Replacement two-stroke piston rings sold individually; four stroke piston rings sold as a set

• Brand: VERTEX
• Vendor Part Number: 22584110
• Bore Size: 67,50 mm
• Compression Ratio: Standard
• Displacement: 250 cc
• Engine Type: 2-Stroke
• Piston Diameter: 67,45 mm
• Piston Material: Aluminum Alloy, Cast
• Piston Size: +1,10 mm
• Product Name: Piston Kit
• Ring Material: Nitride Coated, Steel
• Skirt Coating: Moly Coated
• Style: Cast Big Bore
• Units: Kit