VintCo KTY03-1.5 is a complete top end piston kit for the 1978 Yamaha YZ125, supplied with a 57.5 mm (+1.5 mm over) piston assembly, top end bearing and full top-end gasket set. The kit is intended to provide the required components for a top-end rebuild in one package, using modern materials and manufacturing methods for OEM-level fitment and performance. Additional size options are also available.

Features

• Complete top end rebuild kit for the 1978 Yamaha YZ125
• 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
• Forged piston manufactured in Germany
• MoS2-coated piston for running-in
• Kit pricing is 10% lower than purchasing the components individually

Specifications

• VintCo Part Number: KTY03-1.5
• Product type: Top End Piston Kit
• Nominal piston size: 57.5 mm
• Oversize: +1.5 mm
• Piston diameter: 57.44 mm
• Piston clearance: 0.06 mm

Cross-Reference OEM Part Numbers

• Piston: 2X3-11111-00-00
• 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