Wössner 94.95 mm Forged Piston Kit – Yamaha YFZ450 / YFZ450R/X (2004–2024)

🛠️ Description
Upgrade your YFZ450 with the German-engineered Wössner Forged Piston Kit. Featuring enhanced oiling slots, radial boss machining, and annular grooves, this piston delivers superior wrist pin lubrication and improved durability. Skirt coating reduces friction for a quieter, smoother-running engine with a faster break-in process. Built with tight wall clearances and lightweight forged construction, it’s the perfect high-performance replacement for stock pistons.

✅ What’s Included

• 1x Wössner Forged Piston (94.95 mm)

• 1x Ring Set (#RIK95.00)

• 1x Wrist Pin (#WP029-SP)

• 2x Retaining Clips (#CW20)

📦 Fitment

• 2009–2024 Yamaha YFZ450R / SE

• 2010–2011 Yamaha YFZ450X

• 2011 Yamaha YFZ450X SE

• 2007–2008 Yamaha YFZ450 SE

• 2006–2007 Yamaha YFZ450 Bill Balance Edition

• 2006 Yamaha YFZ450 SE 4x2

• 2004–2009, 2012–2013 Yamaha YFZ450

• 2004–2005 Yamaha YFZ450 LE 4x2

Compression Ratios by Model/Year

• 12.6:1 → 2004–2005 YFZ450 carb

• 12.0:1 → 2006–2009 YFZ450 carb

• 12.3:1 → 2009–2013 YFZ450R EFI / 2010–2011 YFZ450X EFI

• 12.3:1 → 2012–2013 YFZ450 carb

• 12.5:1 → 2014–2024 YFZ450R EFI

• 12.5:1 → 2017 YFZ450 EFI

🛡️ Warranty Info
Wössner piston kits carry a limited warranty against manufacturing defects. Warranty excludes race damage, improper tuning, or installation errors.

🔑 Key Features

• Forged aluminum alloy piston for maximum strength and reduced weight

• Enhanced oiling design for improved lubrication and longevity

• Skirt coated for reduced friction and faster break-in

• Ring land treatment ensures superior sealing and oil control

• Compression ratios range from 12.0:1 to 12.6:1 depending on application

• Designed for both carbureted and EFI Yamaha YFZ450 models