Check the listing for details. WSM-Platinum Series Top End Kit-YAMAHA-1800 SUPER CHARGED-.25MM Over. Condition: New. Listed at 555.43 USD. Platinum Series Top End Kit: 010-873-11P_.25MM Over (1800cc), 86.15mm Bore. Fits: YAMAHA 1800 SUPER CHARGED. Made to exact OEM specifications. Platinum Top End Kits Include: Platinum Pistons, Rings, Wrist Pins, Circlips, Top End Bearings, Head, Base, Common Intake and Exhaust Gaskets required for rebuilding the top end of the motor. Platinum Series Pistons are made of high strength hardened aluminum designed to prevent skirt and ring groove breakage. The piston walls are treated with a nonabrasive coating which reduces heat and friction for added horsepower and greatly extends piston life. **Prior to placing your order please measure your cylinders to determine the appropriate size required. Most pistons come in .25mm increments from stock or standard bore up to 1mm oversize.Platinum Series Top End Kit: 010-873-11P_.25MM Over (1800cc), 86.15mm Bore. Fits: YAMAHA 1800 SUPER CHARGED. Made to exact OEM specifications. Platinum Top End Kits Include: Platinum Pistons, Rings, Wrist Pins, Circlips, Top End Bearings, Head, Base, Common Intake and Exhaust Gaskets required for rebuilding the top end of the motor. Platinum Series Pistons are made of high strength hardened aluminum designed to prevent skirt and ring groove breakage. The piston walls are treated with a nonabrasive coating which reduces heat and friction for added horsepower and greatly extends piston life. **Prior to placing your order please measure your cylinders to determine the appropriate size required. Most pistons come in .25mm increments from stock or standard bore up to 1mm oversize.