My method is a handy comparative tool for determining comparative oil viscosity at room temperature. The units are not Centisokes, but seconds to empty with home-made set-up, similar in concept to standard viscosity meters. I was at the time measuring oil viscosity for gearbox use to find a thin oil to eliminate drag with my Scorpa/Rotax clutch. Time to drain being the output of the test.
I wrote an e-mail some months ago describing my home made viscosity meter, consisting of 50cc of oil passed through a vented plastic container with a. The below is valuable in evaluating what oil to use in forks (to set dampening speed) and what oil to use in 2-cycle motor gearboxes (to affect clutch performance), or just plain interesting to technonerds. Paul, Minnesota Date: 1 06:19pm CST This is a reissue of previous info with some additions. You'll see there's a big difference in different kinds of ATF. ************************************************************ Subject: Oil Viscosities Regarding the discussion of oil weight for front forks, I saved the following post from the observed trials list because it addresses this very question, and because I thought it was kind of cool that someone cared enough to sit at his workbench with a stopwatch and run thickness tests on all kinds of oils. At that point if they didn't perform well you'd have to redo them. My other two cents are why would you? (Two bottles of fork oil are cheap compared to the effort to take the forks apart.) The characteristics of the fork would basically be an unknown until you tested them.
Excellent anti-wear protection and a high resistance to water contamination and degradation.Should the need for more precise damping be required SVI Suspension Fluids range are all fully compatible with each other and will mix with ease.Stable under pressure and are compatible with air, nitrogen or argon charged suspension systems.Extremely high viscosity index to maintain damping at elevated temperature whilst ensuring correct suspension operation at low temperatures.SVI Suspension Fluids are blended using technologically advanced synthetics together with the very latest additive technology to improve foaming tendencies and prolong seal life. XRV750 RD07/07A - each fork leg requires 648cc.XRV750 RD04 - each fork leg requires 635cc.XRV650 RD03 - each fork leg requires 656cc.You will require 2 bottles to replace the oil in both fork legs.
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