VintCo top end piston kit for the 1977-1978 Yamaha YZ400 provides the components required for a top-end rebuild in one package. The kit includes a piston kit with piston, rings, pin and clips, a top end bearing, and a full top-end gasket set with head, base, intake and exhaust gaskets. Components are manufactured using modern materials and production methods for OEM-equivalent fitment and performance.

Features

• Complete top-end rebuild kit
• Includes piston, rings, pin and clips
• Includes top end bearing
• Includes full top-end gasket kit
• Head gasket included
• Base gaskets included
• Intake gasket included
• Exhaust gaskets included
• Intended for top-end rebuilding
• Kit pricing is 10% lower than purchasing the included items individually
• Other size options are available

Specifications

• VintCo Part Number: KTY15-1.0
• Product type: Top End Piston Kit
• Nominal piston size: 86.0 mm
• Oversize: +1.0 mm
• Piston size: 85.92 mm
• Recommended clearance: 0.08 mm
• Piston construction: Forged
• Country of manufacture: Germany
• Piston coating: MoS2 break-in coating

Cross-Reference OEM Part Numbers

• Piston: 2K8-11638-00-00
• Head gasket: 500-11181-00-00
• Base gasket: 500-11351-09-00
• Base gasket: 1M2-11351-01-00
• Intake gasket: 8Y7-13556-01-00
• Exhaust gasket: 214-14613-09-00
• Exhaust gasket: 248-14623-10-00
• Wrist pin bearing: 93310-218A6-00

Vehicle Fitments

• 1977 Yamaha YZ400
• 1978 Yamaha YZ400