Hello brothers (and sisters), I'm Clint and I found this site yesterday while trying to brainstorm why my check valve on my Nightster is now leaking . There was wayyyy more posts on the subject than I thought there would be. It's incredible. Anyway, I'm going to Harbor Freight in the morning to buy a case of Viton O-rings and a set of picks. I'm praying that I can fix the leak myself. Giving my hard-earned money to the dealership is the absolute last thing I want to do. I'll keep you all posted and am glad that I'm not alone when it comes to this problem.