- New replacement cylinder head
- Include cam caps and cam cap bolts
- Include C630 (nickel/aluminum/bronze) valve seats and guides
- Competition valve job
- Shortened valve guides to accept higher lift cams
- Unshrouded combustion chamber
- Blended bowl seat to port
- Stock shaped ports
- Do not include valves, springs or lifters
- Made in the U.S.A.
Yamaha -- YZ 250 -- (1999, 2000, 2010, 2013, 2017, 2001, 2009, 2012, 2004, 2015, 2014, 2002, 2005, 2011, 2007, 2008, 2003, 2006, 2016, 2020, 2021, 2022, 2024, 2023, 2018, 2019)