Check out this site and maybe you'll get some help with any questions on the 450s
cb450dohc.com That should help you. Later on, Bill
Edit:
When I get the chance, sometime today, I'll dig out what I have for info on the 74' I've got 3
74's, by the way (1-CL450K6 and 2- CB450K7s) You can also find a pretty decent parts manual
on line at
crotchrocket.com. In fact, you can find parts listings for lots off japanese bike
there, so check it out. When you get the chance, of course.