Cometic 84-86 Yamaha YZ490 89mm Bore .043 Copper Top End Gasket Kit - C7090

The Cometic 84-86 Yamaha YZ490 89mm Bore .043 Copper Top End Gasket Kit - C7090 is a precision-engineered gasket kit designed for a 89mm bore for 1984–1990 applications.

This Cometic complete gasket kit delivers a comprehensive, precision-matched set of seals and gaskets engineered to OE or better specifications. Each component is manufactured from materials specifically chosen for their temperature range, chemical resistance, and compressibility — ensuring every sealing surface in your engine is properly protected during rebuild or performance upgrades.

• Material: Copper
• Bore Size: 89mm
• Part Number: C7090