Norton F1 Fork oil

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Paul14
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Norton F1 Fork oil

Post by Paul14 »

Hi, Just fitted new fork oil seals on my Norton F1, anyone recommend a good oil viscosity to use and how much to put in each leg.
fogrider
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Re: Norton F1 Fork oil

Post by fogrider »

I assumed the club experts would chime in, so a delay before I responded :
Use 5wt oil, 7.5 OK if you like quite firm forks. Forget quantities,( but expect to use around 400 to 450cc per leg), the air gap is more important , anywhere from 120 mm to 150 mm works but 130 is an ideal . 120 stiffer, 150 softer and better travel with the deeper air gap.
Regards, Terry
East Yorks
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