The Cometic C7399 Top End Gasket Kit is designed for Yamaha YZ125 two-stroke engines from 1998 through 2001. This kit helps restore a reliable seal across the top end while supporting proper engine compression and dependable performance. Its gasket selection is engineered for use during top-end service, rebuilds, and maintenance.
The kit includes materials selected for durability and sealing performance. The graphite gaskets feature a steel core laminated on both sides with flexible graphite, helping maintain a consistent seal through heat cycles and engine operation. Fiber gaskets are designed for maximum sealing, flexibility, and torque retention, while the O-ring gaskets meet or exceed OEM specifications for dependable fit and function.
Designed and manufactured by Cometic, part number C7399 is a direct-fit top-end gasket solution for specified Yamaha applications. Fitment includes the 1998, 1999, 2000, and 2001 Yamaha YZ125. Verify the model year and engine application before installation to ensure correct compatibility.
Features:
- Compression Improvement: Raises compression to support stronger low-end power.
- Graphite Construction: Steel-core graphite gaskets provide flexible, durable sealing performance.
- Fiber Gaskets: Designed for maximum seal, flexibility, and torque retention.
- O-Ring Gaskets: Meet or exceed OEM specifications for reliable fit and sealing.
- Fitment: Fits 1998, 1999, 2000, and 2001 Yamaha YZ125 models.
- Brand and Part Number: Cometic C7399 top-end gasket kit.
Fitment:
1998 Yamaha YZ125
1999 Yamaha YZ125
2000 Yamaha YZ125
2001 Yamaha YZ125