Topic: Crankcase replacement for a K1

[CB750F2]

G/Day Everyone. The crankcases of my CB 750 K1 engine are damaged beyond repair. I have a spare set from a K6. Are there any differences that prevent me from using the K6 cases?
Z1 Enterprises advertise a engine seal kit that fits a K1 and K2 but they do not advertise a kit for the K6. Are ther differences in the engine seals for these motors? If the answer is yes what are the differences? Thanks, Pat

[bryanj]

Cant be 100% sure but a think there may be taranny bearing issues, you will just have to try it and see. The only seal that may be different is again the sprocket seal

[CB750F2]

Bryan,Thanks for that. I am in the process of doing just that and I cannot see any differences. I also have a spare set from a K7 and can see from the outside that the output shaft has a larger diameter so the seal will be different and the case itself is wider in that area as if to house a bigger bearing. As far as using K6 cases in a K1 motor I don't think I have a problem.
Someone else may comment. Thanks, Pat

[Clyde]

Hi Pat,
On all the crankcases up to and including 1976, you should have no problem
Z1 is a great supplier. Go with ti
Clyde

[CB750F2]

Thanks Clyde. I had a good look this arvo and I cannot see anything that would prevent me from doing what I want to do so I am "going for it". Pat