Piston Kit: Wossner 8612DC, with a 77.02mm bore (+0.02mm)

Applications:

YAMAHA

• WR250F (2005-2007)


•  YZF250F (2005-2007)

Gas Gas

• EC250F (2010-2015)

Features:

• Wossner forged pistons known for superior strength and design


• Engineered for efficient combustion chamber heat transfer to cylinder walls


• Elliptical design for a more uniform bearing surface under piston heat expansion, preventing collapse

Manufacturing: Made in Germany

Additional Parts:

• Lock: CW16


• Pin: WP059


• Ring Set: 770XAS-2 (2 Rings)

Specifications:

• Displacement: 249 cm³


• Hub Stroke: 53.6mm


• Clearance: 0.04mm


• Compression Ratio: OEM specified (12.50:1)


• Dome Volume: -2.80cm³


• Compression Height: 22.20mm


• Theoretical Weight: Not provided