VintCo piston kit PSY21-1.5 is a complete oversize replacement kit for 1991 Yamaha WR250 and YZ250 models. Intended for vintage 2-stroke engine rebuilds, it includes the piston, rings, pin and clips, and is produced using modern materials and manufacturing methods for OEM-equivalent fit and performance. A wrist pin bearing is available separately, and additional size options are also available.

Features

• Complete piston kit with piston, rings, pin and clips
• Suitable for vintage 2-stroke engine rebuilds
• OEM-equivalent fit and performance
• Wrist pin bearing sold separately
• Additional size options available
• MoS2 coating to aid running-in

Specifications

• VintCo Part Number: PSY21-1.5
• Bore size: 69.5 mm
• Oversize: +1.5 mm
• Piston size: 69.44 mm
• Clearance: 0.06 mm
• Piston type: Forged
• Country of manufacture: Germany

Vehicle Fitments

• 1991 Yamaha WR250
• 1991 Yamaha YZ250