Norton F1 Fork oil

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Norton F1 Fork oil

Post by Paul14 » Fri Apr 13, 2018 3:32 pm

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.

Posts: 109
Joined: Wed Jun 23, 2010 8:42 am

Re: Norton F1 Fork oil

Post by fogrider » Sun Apr 15, 2018 12:25 pm

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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