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There is only one way about viscosity.experiment. It is important to consult the manufacturers recommendations and. Keeping the same SAE grade i'm having a stiffer suspension but that is what I want. In comparison, heavier shock oil is recommended for heavier cars or rougher courses. Silkolene's expensive series PRO RSF is the oil that makes the difference for me and my bikesĮxpensive but i'm pushing my bikes and as a heavy rider i like that the actual viscosity of PRO RSF is higher. Īll three manufactures are producing high quality oils There is no best fork oil,is like asking for the best bike.very subjective. You have 10W(centistokes?) and you need 12W. So what oil will you blend?from whom?the cheap or the expensive one? Now you can see that actual viscosity for the same SAE grade IS NOT the same

Measurement unit of oil viscosity is centistokes and go for the cheaper onesīoth will feel the same if viscosity will be the same.and by that i don't mean SAE grade! Or save money if you don't push your bike,highway cruising,city transportation etc. pushing the bike to it's limits most of the time So,go for the expensive ones if you really need them eg. The better they are=less damping changes through the ride and through fork service intervals=the better the fork oil is Oil Level - 107mm from the top (fork compressed, spring removed)Ĭlick to expand.all three manufactures have two product lines of fork oil,the cheap and the expensive ones.īase oil,antifoam/cleaning agents and viscosity index are some of fork oil characteristics. Triumph Tiger 955i, Recommended Fork Oil Grade -Kayaba G10, Oil Volume - 720cc (dry fill) there are other forums where this has been sorted out I'm still using ATF for 10 wt, and a 50/50 ATF with Marvel when I want 5 wt I know modern design USDs are different, but thats how we used to tune forks in the old days. what if I don't want/can't use the BMW oil Can I mix other oils to get the right viscosity That exotic 11.5W oil seems to be a marketing technique to lock people into buying BMW fork oil. the quantity isn't important as long the air gap is right. 1 uski Been here awhile Joined: Oddometer: 195 Location: San Jose, CA, USA Hi, My bike calls for BMW 11.5W fork oil. pouring x amount of cc's into the hole often does not do it, you need to measure the displacement. all you heard about KLRs instability on the highway and dived, etc.

on the KLR its dramatic, more oil, less air, less dive, and most noticeable on the top third. any fork that is affected by the air column on top of the oil responds changes in level. As a matter of fact PJ1 has the same SDS data sheet (for and that includes) 6 different weights although they publish that they have 8 different weights."Raising the oil level only effects the last third of travel. No viscosity weights are published however even in SDS. Says they are all of High Viscosity Index and Light Red in color. PJ1 Fork Oil (petrol) 27) (Highly refined mineral oil (C15-C50) is 70-99% weight) Synthetic anti-seal swell additive added.