TOP END PISTON KIT 79-80 YAMAHA YZ IT 250 70.5mm 0.5mm OVER VINTCO KTY11-0.5

VintCo top end piston kit KTY11-0.5 is a complete rebuild kit for the 1979 Yamaha YZ250 and 1979-1980 Yamaha IT250, supplied in 70.5 mm (+0.5 mm oversize). The kit includes a forged piston with rings, pin and clips, a top end bearing, and a full top-end gasket set comprising head, base, intake and exhaust gaskets. Components are manufactured using modern materials and production methods for OEM-equivalent fitment and performance, with OEM part number references provided for fitment verification. The kit is priced 10% lower than purchasing the components individually, and additional size options are available.

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 gasket
• MoS2-coated piston for running-in
• Manufactured using modern materials and production methods for OEM-equivalent fitment and performance
• Kit price is 10% lower than purchasing the items individually
• Additional size options are available

Specifications

• VintCo Part Number: KTY11-0.5
• Product Type: Top End Piston Kit
• Nominal size: 70.5 mm
• Oversize: +0.5 mm
• Piston measurement: 70.44 mm
• Piston clearance: 0.06 mm
• Piston construction: Forged
• Piston origin: Germany
• Piston coating: MoS2

Cross-Reference OEM Part Numbers

• Piston: 2K7-11636-01-00
• Head Gasket: 1W3-11181-00-00
• Base Gasket: 2K7-11351-01-00
• Intake Gasket: 80L-13621-01-00
• Wrist Pin Bearing: 93310-218A6-00

Vehicle Fitments

• 1979 Yamaha YZ250
• 1979 Yamaha IT250
• 1980 Yamaha IT250