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PISTON KIT 99-18 YZ250 1-RING, WOSSNER 8217DA 66.40 A

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PISTON KIT 99-18 YZ250 1-RING, WOSSNER 8217DA 66.40 A

PISTON KIT 99-18 YZ250 1-RING, WOSSNER 8217DA 66.40 A

This Wossner piston kit with a 66.40mm bore (actual size 66.35mm) features a single-ring piston designed specifically for Yamaha YZ250 models from 1999 to 2018. Forged in Germany, it offers durability, thermal efficiency, and reduced friction for high-performance two-stroke engines.



Features





  • Forged single-ring piston for reduced friction and improved response




  • Engineered for efficient heat dissipation to cylinder walls




  • Elliptical design distributes load evenly to prevent localised pressure and piston collapse




  • Manufactured in Germany for reliability and precision





Specifications





  • Bore size: 66.40 mm




  • Actual piston size: 66.35 mm




  • Display (cmĀ³): 249




  • Stroke (mm): 68.00




  • Clearance (mm): 0.05




  • Compression ratio: 2-stroke (Wossner and OEM)




  • Compression height (mm): 38.00





Cross-Reference OEM Part Numbers





  • OLD No. 56-W056.WO.A





Vehicle Fitments





  • 1999ā€“2018 Yamaha YZ250





Included Components





  • Piston: Wossner PN# 8217DA (Single ring)




  • Gasket: PN# D2041




  • Lock: PN# CW18




  • Pin: PN# WP033




  • Ring Set: PN# RSB6640




  • Rod: PN# P2028



$282.74
PISTON KIT 99-18 YZ250 1-RING, WOSSNER 8217DA 66.40 Aā€”
$282.74

Product Information

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Description

This Wossner piston kit with a 66.40mm bore (actual size 66.35mm) features a single-ring piston designed specifically for Yamaha YZ250 models from 1999 to 2018. Forged in Germany, it offers durability, thermal efficiency, and reduced friction for high-performance two-stroke engines.



Features





  • Forged single-ring piston for reduced friction and improved response




  • Engineered for efficient heat dissipation to cylinder walls




  • Elliptical design distributes load evenly to prevent localised pressure and piston collapse




  • Manufactured in Germany for reliability and precision





Specifications





  • Bore size: 66.40 mm




  • Actual piston size: 66.35 mm




  • Display (cmĀ³): 249




  • Stroke (mm): 68.00




  • Clearance (mm): 0.05




  • Compression ratio: 2-stroke (Wossner and OEM)




  • Compression height (mm): 38.00





Cross-Reference OEM Part Numbers





  • OLD No. 56-W056.WO.A





Vehicle Fitments





  • 1999ā€“2018 Yamaha YZ250





Included Components





  • Piston: Wossner PN# 8217DA (Single ring)




  • Gasket: PN# D2041




  • Lock: PN# CW18




  • Pin: PN# WP033




  • Ring Set: PN# RSB6640




  • Rod: PN# P2028



PISTON KIT 99-18 YZ250 1-RING, WOSSNER 8217DA 66.40 A | SMXOFFROAD Ltd