PISTON KIT 86-88 YZ125 57.00, WOSSNER 8118D100 YAMAHA MX

This Wossner 57.00mm (+1.00 oversize) forged piston kit features a high-strength forged construction with an elliptical design that enhances structural integrity, promotes even distribution of combustion forces, and improves thermal management. Its design ensures consistent and reliable performance under demanding riding conditions. Features include a forged piston for high strength and durability, an elliptical design for a uniform bearing surface during heat expansion, and even thrust load distribution to help prevent localized stress and piston collapse. Designed for effective combustion heat transfer to the cylinder walls. Manufactured in Germany. Specifications: Bore 57.00mm, actual diameter 56.94mm, displacement 123 cm³, stroke 50.00mm, clearance 0.06mm, compression height 30.00mm, compression ratio 2-stroke. Cross-Reference OEM Part Numbers: Piston Kit Part No. 56-W559+100.WO, Wossner Piston Kit No. 8118D100, Lock CW16, Pin WP036, Ring Set RSB5700.