IM a WR guy myself but i just read in the June issue of Dirt Bike how often Professional Racers replace parts, it scared me, I knew they were higher maintenance but it sounded crazy, changing pistons every race, subframes every 2 races, plastic and stickers every race, grips ever race, tires every race, that just blew me away. Am I just Nieve? Dam, how often do you guys riding or racing YZ's change out parts like pistons and subframes, lol ????????