PISTON KIT 2014 YZF250 77.0 HC, FORGED WOSSNER 8894DC

This Wossner forged piston kit, part number 8893DC, features a 77.02mm bore with an actual piston size of 76.97mm (+0.02mm oversize). Designed for Yamaha YZF250 models from 2014 to 2015, it is a high-compression piston made in Germany. Its elliptical design enhances strength, distributes load evenly, and supports optimal heat transfer for high-performance four-stroke engines.

Features

• Forged piston construction for high strength and reliability
• High compression design for increased performance
• Elliptical profile for balanced expansion and load distribution
• Engineered for effective combustion heat transfer
• Made in Germany
• Direct OEM replacement
• Easy to install; professional installation recommended if unsure

Specifications

• Bore Size: 77.02mm
• Actual Piston Size: 76.97mm
• Displacement: 249cm³
• Stroke: 53.60mm
• Clearance: 0.05mm
• Dome Volume: -3.00cm³
• Wossner Compression Ratio: 13.70:1
• OEM Compression Ratio: 13.50:1
• Compression Height: 20.20mm

Cross-Reference OEM Part Numbers

• 1SM-11631-01-00
• CW16 (Lock)
• WP087 (Pin)
• 770XAS-2 (Ring Set)

Vehicle Fitments

• YZF250 (2014–2015)