There are several sites on the net that have this info.
http://www.xs11.com/tips/misc/misc3.shtml
http://carcraft.com/techarticles/116_0406_leak/
What this last article does NOT mention is to listen at the intake throttle valve, ehaust and crankcase oil filler to get a hint of what component (if any) is leaking excessively; wither the intake valve, exhaust valve or rings.