I bent both exhaust valves in a freak accident with a sticky auto decompression cam. anyway, got it apart and seats and guides look good. have about 110 hours on bike and it ran fine. should i just buy a couple new valves and keep ring or do other stuff like springs, guides, etc... while it's apart? (piston was done at 100 hours). Would I lap the valves in like a conventional steel valve? Any thing else to consider? Bike sees motocross track play riding as I like to call it. Would like to keep it running safely for another 2 seasons or so. I put about 20 hours a year on.