This VintCo top end piston kit is for the 1977-1978 Yamaha YZ125 and is supplied in a 57.5 mm, +1.5 mm over size. It is a complete top end rebuild kit containing the piston assembly, top end bearing and a full top-end gasket set, intended to simplify rebuild work while maintaining 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
• Gasket kit includes head gasket, base gasket, intake gasket and exhaust gaskets
• Designed for OEM-equivalent fitment and performance
• Uses modern materials and manufacturing techniques
• Kit price is 10% lower than purchasing the included items individually
• Additional size options are available

Specifications

• VintCo Part Number: KTY02-1.5
• Product type: Top End Piston Kit
• Piston size: 57.5 mm
• Oversize: +1.5 mm
• Piston measurement: 57.44 mm
• Piston clearance: 0.06 mm
• Piston type: Forged
• Piston coating: MoS2 coated
• Country of manufacture: Germany

Cross-Reference OEM Part Numbers

• Piston: 2K6-11111-00-00
• Head gasket: 2A6-11181-00-00
• 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

• 1977 Yamaha YZ125
• 1978 Yamaha YZ125