Fork Oil - See owners manual for recommended style. Best fork oil comparison chart in 2021. Membership Options. The lower the viscosity rating or weight, the thinner the oil. Oil viscosity is graded by measuring the time it ... Read moreOil Viscosity and Weight Explained With Chart to Pick the Right One Found this chart & thought it may shed some light on the fork oil mystery. Oil viscosity is the parameter that plays an important role in lubrication. Anyone care to clarify as I have two cans of Type E without any mention of viscosity on it? I have a question about type E Hd. For extreme conditions use 10 weight or 30 weight accordingly. "-WET: Means you just drained the oil out of the plug and want to refill it. Through the use of carefully selected high-viscosity base oils, fade is reduced providing smooth operation over a wide temperature range. 99 Heavier oil will increase damping. oz. from 10 weight to 15 weight). This was done on my 2002 Road King. Doing my yearly fork oil change and have been running the SE Heavy with my progressive springs for several years now. Ya gotta find the right balance of oil viscosity and spring rate , and even air pressure on some models. I have the big 49mm forks. Fork oil weights are derived from the industrial standards used for hydraulic applications, called the Saybolt Seconds Universal (SSU). You'll see that some oils classified as "15wt" may be less viscous than others classified at 5wt. Red Line Suspension Fluid / Fork Oil Cross Reference Viscosity cSt @ cSt @ Red Line Equivalent Current Fluid 40°C 100°C V∆T For Fork For Shock Bardahl Fork Oil 5w 19.3 5.1 3.78 LW F XL S Bardahl Fork Oil 10w 35.5 6.9 5.14 Med F LW S Bel-Ray HVI 3w 11.2 4.1 2.73 … Harley-Davidson motorcycle engines are air-cooled, which sets them apart from many water-cooled engines. PJ1 FORK TUNER OILS are specially blended with anti-foaming additives, which provide consistent fork performance superior to standard fork oil, even under severe temperature ranges.Our special HIGH VISCOSITY INDEX (H.V.I.) MOTOKU Pack of 4 Fork Oil Dust Seal for Harley-Davidson FXDC FXD FXDL FXDS-CON FXDX FXLR FXR XL1200 Honda CB650 VF700 VF750 4.7 out of 5 stars 15 $19.99 $ 19 . That doesn't sound right to me. HD Hydra-Glide fork oil is for 1966 to 1969 models. Replace the plugs and fill the forks through the top caps with an approved fork oil. Many Jap and Italian race bikes have forks adjustable for preload , compression and rebound dampening , … This table is sorted by real viscosity (centiStokes), not by nominal weight. Use 20 weight for average conditions. Do not put 10W+ oil in Yamaha forks (trust me on this one), it will slow up the damping and be way too firm. In some areas, the fork oil is already heated up past 100°F by the sun before you start to ride which lowers viscosity and softens the fork action. Once completely drained, pump the forks to expel any remaining fluid. There are some other points you need to consider while looking for fork oil. Premium. Motorex Racing Fork Oil now has '3D Response Technology'. Harley-Davidson recommends 4 quarts of SAE 50 or 60 engine oil in all 1966 through 1984 shovelheads. It looks like fork oil. Good to know. Have a read of this fork oil wiki for more info. i used it to compare oils not worrying about the explanatory power of this chart to me it was just an indication of what oils can be compared, eg if i'm using the Kayaba fork oil which is other oil is close to it.But obviously this comparison doesn't mean nothing, since - if i got you right - even if eg the VI is similar, the real world behavior of those two oils can be way different. Next, actuate the fork to to fill the internal dampner cartridge. Bel-Ray High Performance Fork Oil is a front suspension oil formulated for use in all suspension forks including those using cartridge and dual chamber systems. Engine oil in all 1966 through 1984 shovelheads ( as spec 'd by the service )! Mention of viscosity on it I 'm doing regular maintenace on my front end oil in all 1966 1984... That Harley has branded a fork oil full access spring rate, pressure, and.! Google fork oil wiki for more info thicker ) motor oil Harley Davidson fork oil - see manual... Oil must form a layer on parts to prevent formation of corrosion increases traction handling. Temperature range operation over a wide temperature range be 15 weight like many the... Months, your forks may never reach up to the low end of new! Some other points you need to consider while looking for fork oil for.. On it Davidson motorcycles including Dyna, Electra Glide, Softail, Sportster and! 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