Is it the 2005 or the 2015 twin cams that had the bad valve seals?
2005 Had some problems with valve seals.
The BLACK 7 mm seals were/are the problem. Use the orange or turquoise color seals, and you'll be good to go.
John
Thanks. There is a 2015 Breakout that my son's interested in and I could not recall. Must be part of the brain relaxing post-retirement.