Auto Barn
Est. 1957
Cometic 84-86 Yamaha YZ490 89mm Bore .043 Copper Top End Gasket Kit
Cometic Gasket
Cometic Gasket

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

$48.55

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 1984-1990 Yamaha YZ490. Cometic top end gasket kit for 89mm bore, .043 thickness.

Key Features

  • Fits 1984-1990 Yamaha YZ490 and 1992-1993 Yamaha WR500.
  • Designed for an 89mm bore with a .043 inch thickness.
  • No additional sealer is needed for installation.
  • Gaskets are made in the USA with American-sourced materials.
  • Built to handle increased cylinder pressures and extreme temperatures.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Secure CheckoutFast Shipping631-982-0042

Fits these vehicles

  • Yamaha WR500 1992-1993
  • Yamaha YZ490 1984-1990

Product Details

This is the Cometic top end gasket kit for your 1984-1990 Yamaha YZ490. It's designed to fit an 89mm bore with a .043 inch thickness, giving your engine a solid seal when you're rebuilding the top end.

Cometic makes these gaskets right here in the USA, using materials sourced domestically. They're built to handle the higher pressures and temperatures that modern, lightweight engines can produce. You won't need any extra sealer with these gaskets; they're designed to seal effectively on their own, making your installation a bit more straightforward.

Specifications

Brand
Cometic Gasket
Manufacturer Part #
C7090
UPC
191070014940

Frequently Asked Questions

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

$48.55