Guys, The secret that Yamaha didn't want out to the public is the reason of the valve noise from a big percent of R1's. The valve guides were made of bad metals! They wear out prematurely! Why doesn't Yamaha have a recall on this! I can tell you why, imagine the $$$$$ involved with this. This really sucks! Don't ask me how I know this information! If you don't believe me on the guide problem, take a head apart that's making noise and you'll find excessive play in them. Maybe if we all got together and complained to Yamaha they might do something.