Parts compatibility across the years

[John Kat]

I noticed that the CB 77 part numbers have changed across the years for the following:
Top yoke, Cylinder barrel.
Are these interchangeable?
Will they fit on a post 1965 model?
Thanks

[LOUD MOUSE]

What is the part number?. ......lm

I noticed that the CB 77 part numbers have changed across the years for the following:
Top yoke, Cylinder barrel.
Are these interchangeable?
Will they fit on a post 1965 model?
Thanks

[John Kat]

The PN's are:
Top yoke: 532303-68040/68050/68060
Cylinder block: 121002-66010/67010/67020
As there are no PN's for parts sold on e-bay I want to make sure the parts will interchange freely?

[LOUD MOUSE]

If you mean. 53230 268 040 fork top bridge.
You will want to get the 050 issue.
If you mean 12100 259-010 lower crank case.
You can use any with/after 050. .........lm

The PN's are:
Top yoke: 532303-68040/68050/68060
Cylinder block: 121002-66010/67010/67020
As there are no PN's for parts sold on e-bay I want to make sure the parts will interchange freely?

[John Kat]

Thanks LM,
The second part is in fact the cylinder block: 12100 266-010 or 12100 267-010/020.
Which one is the correct one?
Will eitheir PN fit ?

[LOUD MOUSE]

I offereds this.
If you mean 12100 259-010 lower crank case.
You can use any with/after 050. .........lm
I can not help you more than what I have offered. .......lm

Thanks LM,
The second part is in fact the cylinder block: 12100 266-010 or 12100 267-010/020.
Which one is the correct one?
Will eitheir PN fit ?

[G-Man]

I hesitate to question LM, but in my parts book(s)

Part 11200-259-xxx is lower Crankcase
Part 12100-2xx-xxx is Cylinder barrel

For John I believe that the barrels are interchangeable after the early 1961 issue which had a different oil feed arrangement. I have a late NOS die-cast 305 barrel which looks different but appears to be compatible.

G