SOHC.co.uk Forums > CB750
Correct Front Wheel Hub K0
StevieWonder:
I’m hoping that my CB750 K0 has the correct front wheel fitted.
According to Service Bulletin #26 the width of the front wheel hub was reduced by 4mm for the K1.
My front hub is 65mm when measured across the outside of the top flanges as shown in the attached photo.
If I have the correct wider hub, then a similar measurement on a K1, k2 etc. should be 69mm.
Grateful if anyone would confirm.
Bryanj:
Two things,
(1) isnt the measurement across the machined flanges?
(2) the later one is suppose to be SMALLER not bigger
Nurse Julie:
Both our UK CB750/4 K2's have a measurement of 65mm, the same as yours. Sorry, terrible pic 🙄. But you are not actually measuring the 'overall width' of the hub the way you are doing it. The overall width is actually 110mm measured across the flanges. Service bulletin #26 relates to the brake disc mounting bolts, not the hub itself.
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AshimotoK0:
My 10/69 K0 Front Hub Dimension
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If anyone has a spare 106 mm to sell me I have 'misplaced' :-[ :-[ one of mine
StevieWonder:
Marvellous, thank you all.
Yes, I got the logic wrong, the latter K1 is supposed to be smaller, but not across the spoke flanges.
I will use the 86mm provided by AsimotoK0 to measure mine though I may need to drop the wheel.
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