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General Category >> Rubber Side Down! >> which fork oil?
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Message started by jabman on 09/15/09 at 01:47:40

Title: which fork oil?
Post by jabman on 09/15/09 at 01:47:40

im replacing the fork seals due to leaking oil from the top of my right fork . Suzuki manual states to use Suzuki #15 oil. would i be ok with synthetic 10w fork oil?

Title: Re: which fork oil?
Post by bill67 on 09/15/09 at 04:06:35

Synthetic is better .but don't go thinner the synthetic will make it move like thinner oil. I use Klotz racing synthetic 15 weight.

Title: Re: which fork oil?
Post by LANCER on 09/15/09 at 05:23:22

I like 20wt Amsoil fork oil because of the firmer damping feeling.

Title: Re: which fork oil?
Post by mikestrikes on 09/15/09 at 08:42:03

I use Wal-Mert brand ATF ! ::)

Title: Re: which fork oil?
Post by bill67 on 09/15/09 at 09:30:12

Don't use Fork oil in automatic trans it will make it slip,Its to slippery for that.

Title: Re: which fork oil?
Post by sakara on 09/18/09 at 08:58:25

I've used Mercon/Dex atf without issue on a few bikes. Bang for the buck. If price doesn't matter, though, using 15 or 20w is a good idea as said.

Title: Re: which fork oil?
Post by PTRider on 09/18/09 at 10:19:17

Changing the viscosity of the fork oil changes the damping characteristics.

Standard ATF is about 15 wt. It doesn't matter which variety...Dexron-III, Mercon-V, etc., and the brand doesn't matter. The newest low viscosity ATFs like Dexron-VI are about 10 wt.

Fork oil must have a very high viscosity index...thickens less when cold and thins less when hot. You don't want a damping change from first thing on a cold morning to hard riding on a hot afternoon. Synthetic oil has a higher VI than conventional oil.