Rear Axle - '79 vs. '80

[jnnngs]

Hi,

Are the '79 and '80 rear axles the same / compatible?

The Z and A have different swinging arms / wheels, but not sure if the rear axle is the same or not.

thanks,

Paul.

[EMS]

Rear axle is the same for Z and A.

[jnnngs]

Ok - Thanks. Was just checking as they have different part numbers.

[EMS]

?? what part-numbers do you have I have 42301-422-000 for both years. B and C have a different part-number, 42301-MA2-000.

[jnnngs]

I have 42301-422-000 for the Z, and 42301-445-000 for the A.

[EMS]

Paul: Don't know where you got that number from, but it is the rear axle for the DOHC CB750F, 1979-1981. Don't say it couldn't fit, but it is not the original part for the CBX-A

[steve murdoch icoa #5322]

Partzilla says it fits a couple bikes and years.
http://www.partzilla.com/parts/detail/h ... 5-000.html

[jnnngs]

Hi,

I got the part number from CMSNL, For the Z it lists it as 42301-422-000 whereas for the A it has (unusually) two entries in the parts list - first one is 42301-422-000, second one is 42301-445-000 (when I first checked I looked at the second one, and didn't notice the first).

So, the -445- has superceded / replaced the -422- at some point I guess.

So, the -445- fits, but does anyone know if they are identical?

Paul.

[EMS]

They are definitely not identical. The part-number would not be different, if they were. Honda was very methodical in their numbering system. An identical part keeps the same part-number, even if used on a different bike.
The difference may be in the total length or the thread length, something not relevant for fit in the CBX.
It could even be that they have a different surface finish, e.g.: chrome vs matte steel. The CBX-B and C axle has a different part-number again.