TOP END PISTON KIT 78-78 YAMAHA YZ 250 70.5mm 0.5mm OVER VINTCO KTY10-0.5

This VintCo top end piston kit is for the 1978 Yamaha YZ250 and is sized at 70.5 mm (+0.5 mm over). It is a complete top end rebuild kit containing a piston kit with piston, rings, pin and clips, a top end bearing, and a full top-end gasket set including head, base, intake and exhaust gaskets. The kit uses modern materials and manufacturing techniques for OEM-equivalent fit and performance.

Features

• Complete top end rebuild kit for the 1978 Yamaha YZ250
• Includes piston, rings, pin and clips
• Includes top end bearing
• Includes full top-end gasket kit
• Gasket set includes head gasket, base gaskets, intake gaskets and exhaust gasket
• Intended to simplify top end rebuild work
• Package price is 10% lower than purchasing the components individually
• Additional size options are available

Specifications

• VintCo Part Number: KTY10-0.5
• Product Type: Top End Piston Kit
• Bore Size: 70.5 mm
• Oversize: +0.5 mm
• Piston Size: 70.44 mm
• Piston Clearance: 0.06 mm
• Piston Construction: Forged
• Piston Coating: MoS2
• Country of Manufacture: Germany

Cross-Reference OEM Part Numbers

• Piston: 2K7-11631-01-00
• 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