This VintCo piston kit is designed for 1976-1978 Yamaha YZ400 and 1976 Yamaha IT400 models, supplying the main components required for a piston replacement on vintage 2-stroke engines. The kit includes the piston, rings, pin and clips, and is manufactured using modern materials and production methods for OEM-equivalent fitment and performance. It is a forged piston made in Germany with a MoS2 break-in coating and a 1.0 mm oversize configuration.

Features

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

Specifications

• VintCo Part Number: PSY04-1.0
• Product type: Piston kit
• Piston size: 86.0 mm
• Oversize: +1.0 mm
• Piston measurement: 85.92 mm
• Clearance: 0.08 mm
• Piston construction: Forged
• Country of manufacture: Germany

Cross-Reference OEM Part Numbers

• 2K8-11638-00-00

Vehicle Fitments

• 1976 Yamaha YZ400
• 1976 Yamaha IT400
• 1977 Yamaha YZ400
• 1978 Yamaha YZ400