Cometic Gasket · New
Cometic 84-86 Yamaha YZ490 89mm Bore .043 Copper Top End Gasket Kit
MPN C7090 · Store SKU cgsC7090
Supplier stock checked 11/7/2026, 6:14:02 AM UTC. Adding a part does not reserve it.
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Product details
Today's lightweight engines are producing more horsepower, higher cylinder pressures, clamp loads and extreme temperatures. Our commitment is to provide innovative, quality gaskets while maximizing your engine's power and performance. Cometic's gaskets are proudly made in the USA with materials manufactured on American soil. We are constantly updating and adding models to our ever growing library of gaskets for Powersports, Street Bikes, Snowmobiles, Harley-Davidson and V-Twin applications. Cometic utlizes their in-house dynamometersand engine assembly rooms to ensure quality and reliability Yamaha WR500Z, 1984-1990 YZ490 Top End Gasket Kit, 89mm Bore, .043" Copper Cylinder Head Gasket Yamaha WR500Z, 1984-1990 YZ490 Top End Gasket Kit 89mm Top End Gasket Kit Top End Gasket Kit Top End Kit
Manufacturer fitment & guides
Check C7090 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
