Supercharged Piston Kit (1800cc) – .75mm Oversize to 86.65mm Bore Fits 2018 Yamaha FC1800A WaveRunner FX Cruiser SVHO Piston Kit WSM 010-873-06PK Supercharged (1800cc) – .75mm Oversize to 86.65mm Bore Competitively priced forged pistons Coated with MOS2 for high performance and heat absorption Ported to match WSM Banshee sleeves Four piston categories from standard, big bore, 5mm long rod and big bore with 5mm long rod Piston pin is 5mm higher on long rod pistons to accommodate long rod Made in Germany Specifications Bore Diameter|86.65mm