PISTON KIT 92-98 YZ250 70.00, WOSSNER 8023D200 YAMAHA MX

This Wossner forged piston kit features a 70.00mm bore size (+2.00mm oversize). Manufactured in Germany, the piston offers superior strength and precise thermal expansion control through its elliptical design. This design ensures even load distribution, reduces pressure points, and enhances durability under high-performance conditions. The kit promotes effective heat transfer from the combustion chamber to the cylinder wall for consistent engine performance. Features include forged piston construction for high durability and strength, an elliptical profile that maintains a uniform bearing surface under heat, reduces localised pressure and prevents piston collapse, efficient combustion heat transfer to cylinder walls, and German precision engineering. Specifications include an actual diameter of 69.94mm, compression height of 36.00mm, stroke of 68.00mm, displacement of 246 cm³, piston clearance of 0.06mm, and a 2-stroke compression ratio. Cross-reference OEM part numbers include Piston Kit Part No: 8023D200, Lock: CW18, Pin: WP033, Ring Set: RSB7000 x2, and Rod: P2029.