Piston Kit 87-07 YFS200 66.25, Wossner 8101D025 Yamaha ATV

Piston Kit 87-07 YFS200 66.25, Wossner 8101D025 Yamaha ATV. Find the product specifications and compatibility information below.

Product details

• Product: Piston Kit 87-07 YFS200 66.25, Wossner 8101D025 Yamaha ATV
• Part number: 56-W573+025.WO
• Brand: Wossner
• The Wossner 8101D025 piston kit is designed for Yamaha YFS200 Blaster models from 1988 to 2006, featuring a 66.25 mm bore for +0.25 mm oversize applications. Manufactured in Germany using forged construction, this piston delivers superior durability and efficient thermal conductivity. The elliptical design ensures even thrust load distribution during piston expansion, reducing localised pressure and minimising the risk of piston collapse. The kit includes all necessary components for a dependable engine rebuild.
• Forged piston construction for high strength and heat resistance
• Optimised combustion chamber heat transfer to cylinder wall
• Elliptical profile provides uniform bearing surface under thermal expansion
• Minimises localised stress and helps prevent piston collapse
• Precision-manufactured in Germany
• Bore Size: 66.25 mm
• Actual Bore Diameter: 66.19 mm
• Stroke: 57.00 mm
• Display Displacement: 199 cm³
• Clearance: 0.06 mm
• Compression Ratio (Wossner and OEM): 2-stroke
• Compression Height: 29.90 mm
• Cross-Reference Wossner Part Numbers
• Piston Kit: 8101D025
• Lock: CW16
• Pin: WP027
• Ring Set: RSB6625 (Quantity: 2)
• Rod: P2030
• Part No.: 56-W573+025.WO
• Vehicle Fitments
• Yamaha YFS200 Blaster (1988–2006)

Compatibility

No separate vehicle-fitment table record was supplied for this part. Check any application details, sizes and specifications above before ordering.

Why buy from FDY Performance?

FDY Performance is a UK motorcycle and ATV parts specialist. We help riders find parts with clear specifications, vehicle fitment information where available and support before ordering.

Need help choosing the right part?

Contact us with your bike make, model and year, plus the part number shown above, and we can help you check compatibility.

• Call: 07765 534854
• Email: fdy@fdyperformance.com
• Website: www.fdyperformance.com