PISTON KIT 94-96 YZ125 55.00, WOSSNER 8116D100 YAMAHA MX

Wossner Piston Kit 8116D100 is a +1.00 oversize forged piston with a 55.00mm bore, designed for Yamaha YZ125 models from 1994 to 1996. Made in Germany, this piston offers robust performance and thermal efficiency. Its elliptical profile ensures consistent load distribution during heat expansion, reducing localized pressure zones and increasing reliability in high-stress engine conditions. Features include high-strength forged construction for maximum durability, an elliptical design for even thrust force distribution under thermal load, and optimisation for efficient heat transfer to cylinder walls. Specifications include a bore of 55.00 mm, actual piston diameter of 54.94 mm, stroke of 54.50 mm, displacement of 124 cm³, clearance of 0.06 mm, and compression height of 28.00 mm. The Wossner compression ratio is 2-stroke, as is the OEM compression ratio. Cross-reference OEM part numbers include Wossner Piston: 8116D100, Lock: CW16, Pin: WP036, Ring Set: RSB5500, Rod: P2047, and Internal Part No: 56-W647+100.WO.