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Re: What in the world is this?

Posted by sgtslag on May 10, 2012; 4:29pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/What-in-the-world-is-this-tp3965249p3977596.html

Yes, it is per fork.  Dexron III/IV/V ATF and fork oil have viscosity stability in common:  they both maintain their viscosity, very accurately, no matter the temperature, within their operating range.  You can use Dexron III/IV/V ATF, or whatever fork oil weight you choose (5-20, typically).  The ATF allegedly clocks in at 8 weight, by the way.  The higher the viscosity (the higher the number), the stiffer the fork response to bumps.

Honda used Dexron ATF because it was readily available, inexpensive (~$4/quart, today's prices), and it works.  If you go with fork oil, expect to pay around $12+/quart, buying it in specialty (MC) shops.

No matter what hydraulic fluid you put into your forks, expect to replace it every two years.  It does wear out, with use/abuse.  It is easy to do, and it helps with traction (the forks, and the shocks, help keep the rubber in contact with the road, tracking bumps, to keep the shiny side up...) -- comfort is a pleasant side-effect.  Cheers!
1979 CB750K (sold, 2012, but not forgotten)
1983 Kawasaki 440 LTD Belt Drive (sold, 2011)
1993 Kawasaki Voyager XII