Piston Kit Forged Series for 2 StrokeDesigned and built for each specific 2-stroke powersports engineForged from high-silicon alloy for maximum strength and dependabilityDedicated forgings and additional lightening operations allow for optimized strength-to -weight ratioKit includes piston, ring(s), wrist pin, and circlips'82-'83 Honda CR480R stroke is 72.00 mm and displacement is 472 cc. '84-'01 Honda CR500R stroke is 79.00 mm and displacement is 491 cc.