I need some help! My R1 has been doing this rattling sound when under load in a high gear. Went to a mechanic, they said might be the blade, the tensioner or the chain but can't be sure. Was told to buy a new cam tensioner (worth $250 + labour cost) and to come back for install and hope for best. Went to a second mechanic, was told it was not any of the above but that it will cost lots of $$$$ to find out what is wrong as they will need to take the bike apart. I just feel like I'm being played around but mechanics.. maybe because I am a chick but is there any way I can find out what is actually causing the noise what what is wrong? Anyone can point me to a good mechanic who will not rip me off but be helpful? I live in Southbank and don't mind riding to a good mechanic and I don't mind forking the money for a new part but not on a guess and hope for the best!