DISTRIBUTION DIAGRAM KAWA GPZ600R or ZX600R

Hello, I have been able to collaborate sometimes in this forum and this time it is my turn or favor. I need the Kawasaki Distribution Diagram GPZ600R or ZX600R of 1990 are the same mechanic. I have the workshop manual but it only says to be tuned by the marks and the engine does not do well, apparently the cams were modified and to be able to know it I need the degrees of opening and closing of the valves. Thank you very much.