WSM Platinum Series Piston Kit - Standard Bore 66.00mm 50-530PK *Fits Yamaha Blaster 200* Platinum Series 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 Made to exact OEM specifications Includes piston, rings, circlips, and wrist pin Fits: 1988-2006 Yamaha Blaster 200 (with 66mm std bore)