VintCo top end piston kit KTY12-0.5 is a complete top end rebuild kit for 1980-1981 Yamaha YZ250 models, supplied with a 70.5 mm piston in +0.5 mm oversize. The kit includes the piston, rings, pin and clips, a top end bearing, and a full top-end gasket set comprising the head, base, intake and exhaust gaskets. Components are produced using modern materials and manufacturing methods to provide OEM-equivalent or better fitment and performance. OEM part numbers are included for fitment verification, and the kit is priced 10% lower than purchasing the included parts individually. Additional size options are also available.

Features

• Complete top end rebuild kit
• Includes piston, rings, pin and clips
• Includes top end bearing
• Includes full top-end gasket set
• Supplied with head gasket, base gasket, intake gasket and exhaust gasket
• Intended for straightforward and cost-effective rebuilding
• OEM-equivalent or better fitment and performance
• OEM part numbers supplied for exact fitment verification
• Additional size options available
• Kit priced 10% lower than purchasing the included components individually

Specifications

• VintCo Part Number: KTY12-0.5
• Product Type: Top End Piston Kit
• Piston Diameter: 70.5 mm
• Oversize: +0.5 mm
• Referenced OE Piston Diameter: 70.44 mm
• Piston Clearance: 0.06 mm
• Piston Type: Forged
• Piston Coating: MoS2
• Piston Manufacture: Made in Germany

Cross-Reference OEM Part Numbers

• Piston: 2K7-11631-01-00
• Head Gasket: 3R4-11181-00-00
• Base Gasket: 3R4-11351-01-00
• Intake Gasket: 80L-13621-01-00
• Exhaust Gasket: 3R4-14613-00-00
• Wrist Pin Bearing: 93310-218A6-00

Vehicle Fitments

• 1980 Yamaha YZ250
• 1981 Yamaha YZ250