Cylinder Works Big Bore Cylinder Kit Arctic Cat / Kawasaki / Suzuki 400 The Cylinder Works Big Bore Kits are designed for those seeking enhanced engine performance. These cylinder kits increase displacement by including everything needed for installation including cylinder(s), rings, hardware, and gaskets. Performing the dual roles of engine rebuilding and performance enhancement, the kits present a complete overhaul solution. Forged from top-notch 2618 aluminum alloy with full molybdenum disulfide skirts, the piston(s) included in these kits are brand new and not refurbished. The enclosed cylinder sleeves are expertly diamond-honed to exact bore specifications and just the right surface finish for impeccable ring seal and oil retention. These Big Bore Cylinder Kits from Cylinder Works meet or even surpass original equipment manufacturer (Oem) quality standards, providing the opportunity to elevate your engine performance beyond factory levels. Specifications: Includes Vertex forged aluminum piston #23533 Compression Ratio 11.3:1 Cylinder Diameter 94 mm Cylinder Kit Type: Big Bore Displacement 434 cc Engine Type: 4-Cycle Includes: Cylinder, Piston Kit and Top-End Gasket Kit Size Over Standard: 4.00mm Features: Big bore kit includes piston(s), cylinder(s), rings, gaskets and hardware required for assembly Oversized piston diameter while maintaining factory compression ratios Replacement cylinder designed in-house by Cylinder Works Diamond honed and nickel silicon carbide (Nsc) plated cylinder wall plating for longer life Forged 2618 aluminum pistons for all applications for superior strength and durability Piston supplied and manufactured by Vertex (Italy) Piston skirts treated to molybdenum disulphite coating for increased piston life, quicker break-in and reduced running noise New, not remanufactured, cylinders and pistons Gasket hardware supplied by Vertex and manufactured in USA Piston profile optimized by Vertex to match compression ratio, cylinder design and ring spec for each unique application Note : Image for reference only. Kit contents vary with application.