Just picked up a ’01 YZF426 with a White Brother’s E series, it's tunable with discs. Does anyone know where to find info on the disc set up? Max discs? Minimum discs? I have no information on setting it up. It works fine how it is, but would like to know more about it. Is it even a good system with the FMF titanium header? Can you buy just the discs? I didn't notice anything on the White Brother’s website about it. Is it discontinued?