VintCo top end piston kit for the 1977 Yamaha YZ250 provides the components required for a complete top-end rebuild in one package. The kit includes a piston, rings, pin and clips, a wrist pin bearing, and a full top-end gasket set covering the head, base, intake and exhaust. It is manufactured using modern materials and processes for OEM-style fit and performance, and is supplied in a 71.0 mm size, 1.0 mm over standard.

Features

• Complete top-end rebuild kit
• Includes piston, rings, pin and clips
• Includes wrist pin bearing
• Includes head gasket, base gaskets, intake gaskets and exhaust gaskets
• MoS2-coated piston for running-in
• Kit pricing is 10% lower than purchasing the components individually
• Additional size options are available

Specifications

• VintCo Part Number: KTY09-1.0
• Product type: Top End Piston Kit
• Nominal piston size: 71.0 mm
• Oversize: +1.0 mm
• Piston diameter: 70.94 mm
• Piston clearance: 0.06 mm
• Piston construction: Forged
• Country of manufacture: Germany

Cross-Reference OEM Part Numbers

• Piston: 2K7-11638-01-96
• Head gasket: 1W3-11181-00-00
• Base gasket: 364-11351-01-00
• Base gasket: 2K7-11351-01-00
• Intake gasket: 8Y7-13556-01-00
• Intake gasket: 80L-13621-01-00
• Exhaust gasket: 214-14613-09-00
• Exhaust gasket: 248-14623-10-00
• Wrist pin bearing: 93310-218A6-00

Vehicle Fitments

• 1977 Yamaha YZ250