SOHC.co.uk Forums > CB750

Box section swing arm?

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Arch stanton:
25mm of shoulder & 20mm of thread. = 45mm overall.
Hope this is of assistance.
Sean. If

SamCR750:
I thought it might be but wasn't 100% sure, it is the same as all the early Ks.
It's just the late Ks, F2 and Autos that have it longer on the drive chain side.

Arch stanton:
I wonder why that was?

SamCR750:
I can only guess Sean as I never measured it but I'm guessing the gearbox sprocket is about 5/8th of an inch further out on the shaft.
On all the later models, everything is cranked out on the near side.
I'll see if I can find a picture of the problems I had when I tried to fit a K swingarm into an Auto frame.

SamCR750:
Sean, look at the angle of the left rear strut, this is what happens when you mix early with later model parts.
Can you imagine IF you could get a shock to fit, the problems it would have going up and down.

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