Top end piston kit for the 1981 Yamaha YZ125, supplied as a complete rebuild set with piston, rings, pin, clips, top end/wrist pin bearing and a full top-end gasket kit. The kit uses modern materials and manufacturing processes for OEM-equivalent or better fitment and performance, and includes OEM cross-reference part numbers for fitment verification.

Features

• Complete top end rebuild kit
• Includes piston, rings, pin and clips
• Includes top end/wrist pin bearing
• Includes head gaskets, base gasket, intake gasket and exhaust gasket
• Intended to simplify top end rebuild work
• Kit price is 10% lower than purchasing the listed components individually
• Additional size options are available

Specifications

• VintCo Part Number: KTY07-1.0
• Piston size: 57.0 mm
• Oversize: +1.0 mm
• Piston diameter reference: 56.94 mm
• Piston clearance: 0.06 mm
• Piston construction: Forged
• Piston coating: MoS2
• Country of manufacture: Germany

Cross-Reference OEM Part Numbers

• Piston: 537-11638-02-00
• Head gasket: 93210-69434-00
• Head gasket: 93211-19413-00
• Base gasket: 4V2-11352-01-00
• Intake gasket: 3R3-13621-01-00
• Exhaust gasket: 3R3-14613-00-00
• Wrist pin bearing: 93310-216L2-00

Vehicle Fitments

• 1981 Yamaha YZ125