The Cometic C3105 Top End Gasket Kit is designed for Yamaha YZ125 two-stroke models from 2005 through 2014. This kit helps restore a reliable top-end seal during cylinder, piston, or top-end engine service while supporting proper compression and dependable performance. It is engineered for fitment with the specified Yamaha YZ125 applications.
Built by Cometic, the kit uses application-specific gasket materials selected for sealing performance, flexibility, and torque retention. The graphite gasket construction features a steel core laminated on both sides with flexible graphite, helping accommodate sealing surfaces and maintain reliable compression. Fiber gaskets are designed to provide maximum seal, flexibility, and torque retention, while the included O-ring gaskets meet or exceed OEM specifications.
Fitment: 2005–2014 Yamaha YZ125. Verify the model year and engine application before installation. The manufacturer part number is Cometic C3105, and the vendor part number is C3105.
Features:
- Compression: Raises compression to support improved low-end power
- Graphite gasket construction: Steel core laminated on both sides with flexible graphite
- Fiber gasket construction: Designed for maximum sealing, flexibility, and torque retention
- O-ring gaskets: Meet or exceed OEM specifications
- Fitment: 2005–2014 Yamaha YZ125
- Brand: Cometic
- Manufacturer part number: C3105
- Vendor part number: C3105
Fitment:
2005 Yamaha YZ125
2006 Yamaha YZ125
2007 Yamaha YZ125
2008 Yamaha YZ125
2009 Yamaha YZ125
2010 Yamaha YZ125
2011 Yamaha YZ125
2012 Yamaha YZ125
2013 Yamaha YZ125
2014 Yamaha YZ125
2015 Yamaha YZ125
2016 Yamaha YZ125
2017 Yamaha YZ125
2018 Yamaha YZ125
2019 Yamaha YZ125
2020 Yamaha YZ125
2021 Yamaha YZ125