Hello George,
Do you drink beer? I hear you ol blokes some times partake in a pint or two on that sunny island of yours

If so have a warm one on me (wish I could join ya but its a bloody long swim mate not to mention a long ass walk across the desert first
Now getting down to business.... You mentioned a mysterious "Yamaha Parts Book" above. Might this be the Yamaha Service Manual or is it part of the lost dead sea scrolls?
Also have to stay one step ahead of you and ask does the deciphering of these codes (when the book is found) need an orphan Annie decoder ring to determine the color to a number or code that can be found with today's manufactures?
I know lots of questions for ya Gerogie old pal (can I call you that yet without sharing a beer with you?) but you are obviously an FZR fanatic like me and the most prolific person on this site today. Just think without guys like me asking dumb ass questions all the time this site would be full of guys who have all the answers and then they would only talk about the nail they picked up on on St. James street while smoking a fat cigar.
1994 FZR 600 White/Blue/Yellow. Been stored for several years and had 12K miles on it now. Working to get it back on the road.
Located in Phoenix AZ