Hi everybody,I read all the message, I need some informations and support for my bike.I just bougth a Yamaha ThunderCat 600 model 1998...I want to know what tipe of oil,filter is good for maintenance....and I want a exhaust for my bike to sound verry loud.A friend told me to empty my original exhaust and the sound will be good.That is a good ideea?? If you want you can write me at my e-mail (optional)