cb500t/cb450 gear expert needed

ive a load of 500t/450 gearboxes and need help identifing them.ive found the chart below but it shows both bikes have a 41 tooth 1st gear.ive got 1st gears that have 40 teeth and dont know which they fit.they are all 5 speed and could these be from an early model.thanks

Honda CB450 STD Road Gearbox
1st 2nd 3rd 4th 5th
17 22 26 29 32 Mainshaft
41 36 33 29 27 Countershaft
2.412 1.636 1.269 1.000 0.844
32.2% 22.4% 21.2% 15.6% 65.0%
Primary Reduction 3.304 76-23
Secondary 2.333 35-15
Honda CB500T STD Road Gearbox
1st 2nd 3rd 4th 5th
18 23 26 29 32 Mainshaft
41 35 32 29 27 Countershaft
2.278 1.522 1.231 1.000 0.844
33.2% 19.1% 18.8% 15.6% 63.0%
Primary Reduction 76-23

Could be someone was trying to fit a 750 or 500 transmission?

theyre deffinately cb450/cb500t parts as ive only bought for these bikes down the years.im just wondering if honda changed gear ratios somewhere down the line.thanks for the reply

You need the actual parts microfiche or update manual for 500T.
There is a good possibility, if everything is ONLY 450/500 that the manual just re-printed 'old' specs (Honda make so much stuff it happens, people make mistakes or get sloppy)
There are several manuals where specs or procedures are just flat out wrong (not just Honda)
I had an XR350 many years ago, the rocker arms part numbers were 'wrong' (intake and exhaust not marked left/right )
After multiple orders and getting wrong part with correct number, I had to send someone to 'local' (75 miles away) parts warehouse and sift through parts bins to get what was needed