This VintCo piston kit is a replacement assembly for 1991 Yamaha YZ250 and WR250 2-stroke models, manufactured using modern materials and production methods for OEM-equivalent fitment and performance. The kit includes the piston, rings, pin and clips, and is intended for 69 mm applications with a +1.0 mm oversize.

Features

• Complete piston kit including piston, rings, pin and clips
• Suitable for vintage 2-stroke engine rebuilds
• Forged piston
• MoS2 coated for running-in
• Wrist pin bearing available separately
• Made in Germany

Specifications

• VintCo Part Number: PSY21-1.0
• Piston size: 69 mm
• Oversize: +1.0 mm
• Piston measurement: 68.94 mm
• Clearance: 0.06 mm

Vehicle Fitments

• 1991 Yamaha WR250
• 1991 Yamaha YZ250