VintCo KTY09-0.5 is a complete top end piston kit for the 1977 Yamaha YZ250, supplied in a 70.5 mm (+0.5 mm over) size for top-end rebuild work. The kit includes a VintCo piston kit with piston, rings, pin and clips, a wrist pin bearing, and a full top-end gasket set covering the head, base, intake and exhaust. Components are produced using modern materials and manufacturing methods for OEM-equivalent or better fitment and performance, and the kit price represents a 10% saving compared with purchasing the components individually.

Features

• Complete top end rebuild kit
• Includes piston, rings, pin and clips
• Includes wrist pin bearing
• Includes full top-end gasket set
• Includes head gasket
• Includes base gaskets
• Includes intake gaskets
• Includes exhaust gaskets
• Forged piston for top-end rebuild applications
• MoS2-coated piston for running-in
• OEM-referenced for exact fitment
• Additional size options available
• Kit price includes a 10% saving over buying individual components

Specifications

• VintCo Part Number: KTY09-0.5
• Product Type: Top End Piston Kit
• Nominal piston size: 70.5 mm
• Oversize: +0.5 mm
• Piston diameter: 70.44 mm
• Piston clearance: 0.06 mm
• Piston construction: Forged
• Piston coating: MoS2
• Country of manufacture: Germany

Cross-Reference OEM Part Numbers

• Piston: 2K7-11636-01-00
• 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