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Cometic Gasket is the world leader in custom multi-layer steel head gaskets for performance and motorsport engines. From off-the-shelf MLS for popular platforms to bespoke gaskets for race-only builds, Cometic seals everything from Honda B-series to LSX.
Maintain peak engine performance with the Cometic O-Ring Exhaust Gasket Kit. Designed specifically for the 1999-2000 Yamaha YZ125, this high-quality gasket ensures a precise, leak-free seal between your exhaust manifold and cylinder. Exhaust leaks can lead to significant power loss and erratic engine tuning; this kit provides the reliability needed for competitive motocross and trail riding.
Whether you are performing a top-end rebuild or simply replacing worn components, choosing the right gasket is critical for maintaining compression and exhaust scavenging efficiency. Cometic is a trusted name in powersports, delivering professional-grade sealing solutions that withstand the rigors of high-RPM riding. Upgrade your bike's reliability with this essential maintenance component. Find all your high-performance engine parts and gaskets at GGCRACING.
| Brand | Cometic Gasket |
|---|---|
| Manufacturer part number | C7399EX |
| GGC SKU | CGSC7399EX |
| UPC / GTIN | 191070041557 |
Use the manufacturer part number when you compare with other listings or ask us to confirm a match.
| Box size | 7 × 6 × 0.25 in |
|---|---|
| Shipping weight | 0.02 lb |
| Year | Make | Model | Trim |
|---|---|---|---|
| 1999-2000 | Yamaha | YZ125 | Base |
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