If you're looking to maintain or restore the performance of your Yamaha dirt bike, the Cometic Gaskets C3178-EST Top End Gasket Kit is your go-to solution. This kit is specifically designed for the Yamaha WR450F (2007-2015), Yamaha YFZ450R (2009-2020), and Yamaha YZ450F (2006-2009). With a 98mm bore and .023 thickness, this MLS (Multi-Layer Steel) cylinder head gasket ensures a reliable seal and optimal performance under pressure.
Cometic Gaskets has built a reputation for quality and reliability in the powersport industry. This gasket kit is engineered to withstand the rigorous demands of off-road riding, ensuring your engine maintains peak performance. Whether you're hitting the trails or the track, you can trust that these gaskets will keep your engine sealed tight and running smoothly.
One YFZ450R owner shared, "I replaced my stock gaskets with the Cometic kit, and the difference was noticeable. The engine runs cooler and has a more responsive throttle. No leaks, even after a few hard rides!"
Another WR450F rider noted, "Installation was straightforward, and I appreciate the attention to detail in the kit. Everything lined up perfectly, and I’m confident in the seal it provides."
Other Part Numbers:
Cometic Gaskets #68-31780E
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
2007-2009, 2011-2015 Yamaha WR450F |
WR450F | 2007-2009, 2011-2015 |
|
2009-2020 Yamaha YFZ450R |
YFZ450R | 2009-2020 |
|
2009-2019 Yamaha YFZ450R SE |
YFZ450R SE | 2009-2019 |
|
2006-2009 Yamaha YZ450F |
YZ450F | 2006-2009 |

Cometic is a company known for manufacturing gaskets and engine seals for different engines. They cater to various industries such as the marine, industrial, agricultural, and automotive sectors. The company was established back in 1989 and has since provided high performance sealing solutions worldwide.
Motorsport ParticipationThe company is considered as the leading supplier when it comes to gaskets and seals worldwide. They have provided high-performance gaskets in various racing events such as NASCAR, GNCC, and AMA. They helped top racing teams compete at the highest level by improving engine reliability.
Built for Extreme PerformanceWhether you are into endurance races at more than 220mph or setting the fastest drag records in 2000 hp top fuel race cars, Cometic has the right product for you. They design their products to withstand extreme temperatures and pressures. Hence, they are the brand chosen by the best in motorsports.
Best Value of ProductCometic has always been dedicated to providing high-quality products that provide customer satisfaction. They have always given their customers the best product at the most competitive price.
Quality in Every ProductThe company is housed in a 70,000 square foot facility with state-of-the-art manufacturing equipment that helps them create products that are superior compared to its competitors. Using premium materials, they are able to develop gaskets that provide proper seals every time.
Purchase Cometic Products at Vivid RacingIf you are in search of a high-quality gasket for your engine, then Cometic is the brand for you. Designed for OEM or high-performance applications, Cometic has got you covered. To know more about them, visit Vivid Racing and check out their list of products that fit your needs.