The bike I have is going on five years old.It has never been raced and has enjoyed easy trail riding over the years.On average,it has been riden from May to October only about four hours a month.It is garage stored and is always been kept clean.Has had regular services and the engine,frame and tires are all in very good condition.I have never experienced valve issues and the engine as I say is absolutely sound.The front forks were custom engineered by an outfit in California and are unbelievably responsive and comfortable!!With regret I have to sell the bike as I am buying a house and need to gather funds together. If you have any further questions please feel free to ask me. Thanks Location: Leesburg it's NOT ok to contact this poster with services or other commercial interests dc