Supercharged Piston Kit (1800cc) – 0.75mm Bore Oversized to 86.65mm Fits 2018 Yamaha FC1800A WaveRunner FX Cruiser SVHO WSM 010-873-06PK Supercharged Piston Kit (1800cc) – 0.75mm Bore Oversized to 86.65mm Forged pistons at a competitive price MOS2 coating for high performance and heat absorption Ports matched to WSM Banshee sleeves Four piston categories: standard, big bore, long rod and big bore with 5mm rod Piston pin is 5mm higher on long rod pistons to accommodate the long rod Made in Germany Specifications Bore Diameter|86.65mm