Hey guys, I'm coming up on 20k miles on the busa. I just had tires put on yesterday.Ordered brake pads and plugs to change out this weekend. I'm contemplating having the valves checked. This is something I don't know how or feel comfortable doing myself. The local dealer wants $450.00 to check the valves and more if they have to adjust. I'm all about maintenance so if I need to do it so be it, but that's a lot of money to spend on something for nothing. How often do you guys check your valves?