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Post by mouse on May 13, 2021 11:03:39 GMT 1
Morning all
i just wondered what grade of fork oil you should use in 4LO forks, i.e 5, 10 etc. Would like keep to use silkolene if poss.
Many thanks
Mouse
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Fork Oil
May 13, 2021 11:36:13 GMT 1
via mobile
Post by chrisg on May 13, 2021 11:36:13 GMT 1
Think the original spec is sae30. Probably depends on how you ride,you weight and if 2 up?
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Post by dougw on May 13, 2021 11:46:22 GMT 1
Can of worms, suspension, very much dependent on rider weight, riding style and preferences.
Haynes states SAE 10/30 or good quality fork oil, back in the 80`s I used SAE 20/50. .
5 would ihmo be to thin, I`d try 10, got that in mine and it seems reasonable.
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Post by dusty350 on May 14, 2021 7:09:31 GMT 1
Hi mate Couple of rebuild threads on Youtube; Really simple forks to rebuild. Interesting that the guy in the first vid recommends heavier oil - 15wt rather than 10 (standard ?), and more oil than standard thus reducing the air gap. This is what I did with the Rgv forks and they definitely feel firmer. I've got enough, fresh Silkolene 15wt left over from mine to save you buying some if you decide to go with heavier oil Dusty
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Post by mouse on May 14, 2021 7:32:19 GMT 1
Cheers all!
Thanks Dusty, that's v generous! Seals are ordered and on their way
Mouse
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Post by julianboolean on May 14, 2021 9:02:34 GMT 1
I can't remember what grade oil I used in the 80s, probably 20W, but definitely put more oil in than standard, they were quite soft standard, and I only weighed 10 stone back then
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Fork Oil
May 14, 2021 19:19:31 GMT 1
via mobile
Post by tacky1 on May 14, 2021 19:19:31 GMT 1
I used 15 in all mine and they work great.
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Post by bare on May 16, 2021 0:52:03 GMT 1
There Is a search function. Again then: Mobile 1 ATF as fork oil. Try it ??
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Post by dougw on May 18, 2021 13:03:02 GMT 1
Don`t use cheap oil seals, especially anything that claims to be "Leak Free" . They cause stiff fork action ("Sticktion")
OEM, NOK or K Tech seals are all good.
Fitted some Pyramid Plastics seals that a mate supplied on his MX forks, oil seal was tight and dust seal wouldn`t fit without being attacked with a scalpel.
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