Jubilee fork oil - how much?

That sounds like Jubilee forks! ..... I think the oil was more for lubrication than damping!

Iâm not sure which forks you have but my early manual says 70cc of SAE 30, but in my post 61 manual it says they had 5fl oz (142 cc ) of SAE 20 so you may need to add more?

dan

I think Norton were exaggerating a bit when they said that Jubilee forks were oil damped as there are no proper hydraulic valves inside that I ever saw. My 1959 manual says 75cc of 20 grade oil - I have a feeling that 142cc was for the Roadholders on the Navigator. It will be interesting to hear your opinions after trying more oil. I suppose that as the fork inner leg/bottom bush slid over the damper tube there was some resistance at the end of it's stroke which Norton called damping (but not as we know it 60 years later).

I gave up a long time ago as I only seemed to get more oil leaks and oddly enough the forks weren't all bad even without proper damping.

Denis

i just rechecked my manual, Patrick is right, 142 cc was for the Navi, 75 cc of SAE 20 is what they recommend. sorry for the duff info! No harm in trying to add more oil tho! Let us know how you get on.

dan

Youâve reduced the compressible air volume so it should reduce diving under braking at least - assuming of course that you can brake hard enough to cause them to dive!