VintCo top end piston kit KTY03-00 is a complete standard-bore rebuild kit for the 1978 Yamaha YZ125. It includes a forged piston kit with piston, rings, pin and clips, a top end bearing, and a full top-end gasket set comprising the head gasket, base gasket, intake gasket and exhaust gaskets. It is intended to simplify top-end rebuild work while providing OEM-equivalent or better fitment and performance, with OEM cross-reference numbers included for fitment confirmation.

Features

• Complete top end rebuild kit
• Includes piston, rings, pin and clips
• Includes top end bearing
• Includes head gasket, base gasket, intake gasket and exhaust gaskets
• Designed for straightforward, cost-effective rebuilds
• Kit price includes a 10% saving compared with purchasing the components individually
• Manufactured using modern materials and manufacturing techniques
• OEM cross-reference numbers provided for exact fitment confirmation
• Additional size options available

Specifications

• VintCo Part Number: KTY03-00
• Product type: Top end piston kit
• Bore size: 56.0 mm
• Bore designation: Standard
• Piston diameter: 55.94 mm
• Piston clearance: 0.06 mm
• Piston construction: Forged
• Piston coating: MoS2 break-in coating
• Country of manufacture: Germany

Cross-Reference OEM Part Numbers

• Top end piston kit: 2X3-11111-00-00
• Piston: 360-11631-03-96
• 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