TOP END PISTON KIT 78-78 YAMAHA YZ 250 71.0mm 1.0mm OVER VINTCO KTY10-1.0

VintCo top end piston kit KTY10-1.0 is a complete top-end rebuild kit for the 1978 Yamaha YZ250. It includes a 71.0 mm piston in +1.0 mm oversize, rings, pin and clips, a wrist pin bearing, and a full top-end gasket set with head, base, intake and exhaust gaskets. The kit is produced using modern materials and manufacturing methods for OEM-equivalent fitment and performance, with OEM part numbers provided for exact application reference.

Features

• Complete top-end rebuild kit
• Includes piston, rings, pin and clips
• Includes top end bearing
• Includes full top-end gasket kit
• Supplied with head gasket
• Supplied with base gaskets
• Supplied with intake gaskets
• Supplied with exhaust gasket
• Forged piston
• MoS2-coated piston for break-in
• Intended for exact fitment using OEM cross-reference part numbers
• Kit price is 10% lower than purchasing the components individually
• Additional size options are available

Specifications

• VintCo Part Number: KTY10-1.0
• Piston size: 71.0 mm
• Oversize: +1.0 mm
• Reference piston diameter: 70.94 mm
• Piston clearance: 0.06 mm
• Piston manufacture: Germany
• Piston construction: Forged
• Piston coating: MoS2

Cross-Reference OEM Part Numbers

• Piston: 2K7-11638-01-00
• Head gasket: 1W3-11181-00-00
• Base gasket: 364-11351-01-00
• Base gasket: 2K7-11351-01-00
• Intake gasket: 8Y7-13556-01-00
• Intake gasket: 80L-13621-01-00
• Exhaust gasket: 2K7-14613-09-00
• Wrist pin bearing: 93310-218A6-00

Vehicle Fitments

• 1978 Yamaha YZ250