This VintCo piston kit is for 1974-1975 Yamaha YZ250 models and is intended for vintage 2-stroke engine rebuilds. It uses modern materials and manufacturing methods for OEM-level fitment and performance, and includes the piston, rings, pin and clips. This kit is a 70.5 mm piston in +0.5 mm oversize for vintage motorcycle applications.

Features

• Complete piston kit with piston, rings, pin and clips
• Suitable for 1974-1975 Yamaha YZ250 models
• Forged piston
• MoS2 coated for break-in
• Wrist pin bearing sold separately
• Rings will not work with the original chrome-plated Yamaha cylinder on 1974-1975 YZ250 models
• Rings are only compatible with Nikasil plating or an iron liner
• Made in Germany

Specifications

• VintCo Part Number: PSY34-0.5
• Piston size: 70.5 mm
• Oversize: +0.5 mm
• Piston measurement: 70.44 mm
• Clearance: 0.06 mm

Vehicle Fitments

• 1974 Yamaha YZ250
• 1975 Yamaha YZ250