hi everyone, i have been all over the internet looking for a book or manual on the subject of how to hot rod a z-1. so far all i come up with is the manual. is there something out there or someone that can help me with this problem? the year of the bike is 1973-75. i am doing this for my brother. he can't do this right now. please let me know something. i sure would appreciate it. thanks, juls52