PISTON KIT 02-20 YZ85 47.50 A, WOSSNER 8104DA YAMAHA MX

Wossner forged piston kit with a 47.50mm bore. Standard size replacement for Yamaha YZ85 models. Engineered for durability and thermal efficiency in two-stroke engines, this German-made piston utilises advanced materials and design features to ensure consistent performance under high-stress conditions. Features forged construction for maximum strength and longevity. Designed to facilitate optimal combustion heat transfer to the cylinder walls. Elliptical profile ensures even load distribution and reduces piston collapse risk. Made in Germany. Specifications: Bore: 47.50mm, Actual Bore: 47.45mm, Engine Displacement: 85 cm³, Stroke: 47.80mm, Clearance: 0.05mm, Compression Ratio: 2-stroke (Wossner and OEM), Compression Height: 26.00mm, Lock Part Number: CW14, Pin Part Number: WP058, Ring Set Part Number: RSB4750, Con Rod Kit Part Number: P2008. Cross-Reference OEM Part Numbers: 5PA-11631-10-A0, 09104832, 805M04750.