This VintCo top end piston kit is a complete rebuild set for the 1978 Yamaha YZ125, supplied for 56.5 mm (+0.5 mm over) applications. It includes the piston assembly, top end bearing and a full top-end gasket set, and is produced with modern materials and manufacturing methods for OEM-equivalent fit and performance.

Features

• Complete top-end rebuild kit
• Includes piston, rings, pin and clips
• Includes top end bearing
• Includes full top-end gasket kit
• Gasket kit includes head gasket, base gasket, intake gasket and exhaust gaskets
• Coated to assist initial break-in
• Designed for OEM-equivalent fit and performance
• Kit pricing is 10% lower than purchasing the components individually
• Additional size options are available

Specifications

• VintCo Part Number: KTY03-0.5
• Product type: Top End Piston Kit
• Piston diameter: 56.5 mm
• Oversize: +0.5 mm
• Piston OE reference size: 56.44 mm
• Piston clearance: 0.06 mm
• Piston construction: Forged
• Piston coating: MoS2
• Country of manufacture: Germany

Cross-Reference OEM Part Numbers

• OEM reference: 2X3-11111-00-00
• Piston: 360-11636-03-00
• Head gasket: 2X3-11181-00
• Base gasket: 18G-11351-02-00
• Intake gasket: 3TT-13621-00-00
• Exhaust gasket: 3PA-14613-10-00
• Exhaust gasket: 248-14623-10-00
• Wrist pin bearing: 93310-216L2-00

Vehicle Fitments

• 1978 Yamaha YZ125