Speedo Drive Bush

[Martin Wollacott]

Hi All,
I am getting an oil leak from this bush/O ring (pt numbers 12068-0537 and 10268-0538) on my 1964 A65r. Does anyone know what size the O ring should be? Plus, does anyone have a photo of what the bush should look like? The one on this bike looks like a hand made thing (I am holding it the wrong way round)
Any help appreciated.
Regards, Martin

[chaz]

cant say either of my Thunderbolts had them, nor the latest A50.
two possibilities, one being incorrect o ring some have metric options as only ones available, dont fit tight enough.
second is the hole round, could be tapered or oval.
do you have inspection kit? measure bore diameter, groove diameter and width, should be able to get one to fit.

[Martin Wollacott]

Thanks for the response. Measuring everything will be my next step. I just wondered if anyone knew what the original size should be.
Regards, Martin