Start with an oil near 15 cSt@40C (centistokes) like the Maxima 5w. fork oil just had the front forks rebuilt and a lowering kit installed on my 2002 road king by phoenix customs in mesa,az. Is he correct? Part # 99880-73 Seems like a lot of conflicting information in this post. Thanks for any info. Therefore, I thought I would share with everyone some Harley-Davidson fork oil specifications – in particular, information regarding the proper fork oil weight to use and capacities for major models. Use Shock Therapy Medium #10 in suspension systems where more dampening control and slower rebounds are desired, including those made by Ohlin*, FOX*, RACETECH (US2), Koni* and WP shocks; and Harley-Davidson* forks that recommend type "E" or "B" fork oil. Local indie that worked at the factory says type E is 30 weight fork oil. 118.6 9.5 82 10.4 67.3 8.9 64.9 8.9 20.9 6.67 20.75 7.6 ... 21.6 4.4 21.6 6.2 20.5 3.82 16.9 3.77 16.49 3.45 3.45 15.06 14.57 4.1 12.6 4.4 10.3 1.9 9.2 VISC. 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. Harley-Davidson has made nine different types of engines, starting in 1929. Oil viscosity will have more effect on rebound damping than compression damping. Use 20 weight for average conditions. I like the look of the new oil I installed. Motorex Fork Oil Now Comes in 4W Viscosity. Type E 5wt. from 10 weight to 15 weight). CST@40C Viscosity-Centistokes. No. Have a read of this fork oil wiki for more info. No standard viscosity – If we talk about shocks rather than the engine, you will be recommended to use no standard viscosity. I'm doing regular maintenace on my front end. Google fork oil viscosity chart and look through the table. November 2, 2016. Found this chart & thought it may shed some light on the fork oil mystery. The capacity varies by model but for most Softails and Dynas this amount is about 9 to 10 oz. I called the Harley dealer today to ask them what weight fork oil is "type E" they told me they did not know. Odd that Harley has branded a fork oil just for the Showa forks. The steps to perform this service are detailed yet simple, as Bob and Mark demonstrate in this video on how to fill fork oil on your Harley Ultra. Ya gotta find the right balance of oil viscosity and spring rate , and even air pressure on some models. The viscosity of fork oil plays a huge role in the damping effect of the forks, as a thicker oil will create more resistance as it is passing through the small orifices in the damping rod. 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.) Has anyone experimented with different oil weights? I knew the Victory lineup had 7.5 weight fork oil. Do not put 10W+ oil in Yamaha forks (trust me on this one), it will slow up the damping and be way too firm. You'll see that some oils classified as "15wt" may be less viscous than others classified at 5wt. Discussion on V-Twin Harley Davidson motorcycles including Dyna, Electra Glide, Softail, Sportster, and more. Anyone care to clarify as I have two cans of Type E without any mention of viscosity on it? of fork oil into the fork tube. Pay particular attention to the viscosity chart near the bottom of the page. I have the big 49mm forks. Harley-Davidson recommends 4 quarts of SAE 50 or 60 engine oil in all 1966 through 1984 shovelheads. (which keeps the viscosity high thus stiffening fork … Oil viscosity is measured and given a number, which some people also refer to as the “weight” (thickness) of the oil. oz. It changes with temperature, shear rate, pressure, and thickness. The oil is too thick for the small stock orifices. New fork oils provide new suspension tuning technology. CST@100C VISC. The transmission uses 1.5 pints of HD transmission lubricant, although many people use 75w90 gear oil mixed 3-to-1 with Lucas oil. This measurement uses a similar viscometer arrangement as used to determine a cSt value, but grades the oil using a much more sensitive viscosity calibration scale. Most of us don't have a harley manual anymore! 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. so I put Amsoil 20 wt in which says it is the same as H-D type E . fork oil. Motorex Racing Fork Oil now has '3D Response Technology'. 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 . Once completely drained, pump the forks to expel any remaining fluid. He was surprised that no one knew the viscosity of Indian Fork oil. 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. Many Jap and Italian race bikes have forks adjustable for preload , compression and rebound dampening , … I used 15 Wt fork oil 11.1 ounces on each fork tube. If using Harley brand fork oil then type “B” or “E” is recommended depending on the model. Heavier oil will increase damping. Fork Oil - See owners manual for recommended style. 20w-50 oil may be used in all three – Engine, Transmission, and Primary Case as specified by the H-D Motor Company, however Harley Performance recommends using a heavier 75w-90 gear lube in the transmission.Both methods exceed the manufacture’s and API specification and will not void any warranty. Plus, the oil must form a layer on parts to prevent formation of corrosion. How To Harley Davidson Fork Oil Change. Through the use of carefully selected high-viscosity base oils, fade is reduced providing smooth operation over a wide temperature range. Press Release. well that's not very helpfull. Good to know. Too Fork Oil Unless otherwise noted we recommend the stock oil viscosity and level. That doesn't sound right to me. 99 Oil viscosity can be changed to alter damping. It looks like fork oil. If that is too thin, go to the Maxima 10w. Next, actuate the fork to to fill the internal dampner cartridge. Full Forum Listing. Replace the plugs and fill the forks through the top caps with an approved fork oil. Change in five weight increments (i.e. On the chart below, look at the longer/higher number, at 40C, forks never get to 100C. he reassembled with 20w. Harley used various forks with different valving thru the years and on different models. Fork Oil - 16oz. I have Bel Ray 30 if it is the right viscosity, I want to use it. Sign up for premium membership and get access to our best Harley repair videos and step-by-step instructional projects. Oil viscosity is the parameter that plays an important role in lubrication. The only change that needs to be made to this chart is that in … The lower the viscosity rating or weight, the thinner the oil. The manual calls for 29.6 oz or 875 cc. Such as. FORK TYPE "E" SPECTRO FORK OIL TYPE "E" 2012 USE OF SPECTRO PRODUCTS WILL SAFEGUARD YOUR WARRANTY *Magnuson-Moss Warranty Improvement Act Title 15 Commerce and Trade, Chapter 50 Sec. Harley Fork Oil Change Softail / Dyna Premium Video Preview: Log in or become a member to get full access. This was done on my 2002 Road King. 15 I will attach a chart that will show the various cSt ranges that a "x"W oil must meet to be called as such. Best fork oil comparison chart in 2021. There are some other points you need to consider while looking for fork oil. Type E is for "Showa" forks.Part # 99884-80 Fork Oil - 16oz. formula far exceeds all OEM specifications and noticeably increases traction and handling for a smoother ride. Instead, look for a fork oil with a high viscosity … Type B 10w. Look for a high-VI fork oil. For extreme conditions use 10 weight or 30 weight accordingly. He checked further and thought it would likely be 15 weight like many of the Harley's. With the 49mm fork tube fully extended; pour, slightly more than, 24 fl. Motor Oil Viscosity Ratings Viscosity ratings … 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 … Duration: 2:21 Become A Member. The Ohlins R&T oil that's 5wt which I use on my zx6r is 19 cSt (centistoke...unit of viscosity measurement) at 40 degrees C. Traxxion Dynamics recommends using Maxima fork oil 15wt in their instructions that come with their damper … Premium. "Dry fork requires .5 to 1.0oz more than the wet amount due to residual oil left clinging inside the fork." HD Hydra-Glide fork oil is for 1966 to 1969 models. I have a question about type E Hd. Lighter oil will decrease damping. The higher the viscosity rating, the thicker the oil. "-WET: Means you just drained the oil out of the plug and want to refill it. Membership Options. He also said 20 weight would not be out of the question. Shock and Fork Fluid Shoot-Out 0 20 40 60 80 100 120 140 160 14.1 141.2 12. This table is sorted by real viscosity (centiStokes), not by nominal weight. If corrosion starts, it won’t stop, spreading and depositing flakes of contaminant in the oil that act like sandpaper and scour metal parts until they’re worn out. Of course, when all is said and done, I am going to have to refill the front forks. Air-cooled engines run warm and therefore require a higher viscosity (thicker) motor oil. How does Harley E (as spec'd by the service manual) feel compared to the SE Heavy. Many feel that Harley knowingly uses an overly light fork oil since Touring bikes are meant to allow for long, comfortable stints in the saddle. Notice that a 50wt motor oil has similar viscosity at said temps to a 90wt gear oil. It is very close in specs to the recommended Yamaha 01 fork oil. So, then the Showa forks all come with that murky brown oil. man does it ride good. Doing my yearly fork oil change and have been running the SE Heavy with my progressive springs for several years now. Harley-Davidson motorcycle engines are air-cooled, which sets them apart from many water-cooled engines. Fill It. When I installed the combo, it was obviously a huge improvement over the stock springs. My FXDB is a '06 model. Harley-Davidson makes two types of fork oil for shovelheads. Likewise, in the winter months, your forks may never reach up to the low end of the viscosity chart below. Oil viscosity is graded by measuring the time it ... Read moreOil Viscosity and Weight Explained With Chart to Pick the Right One We have added here the best fork oil for motorcycle and car also. Fork oil weights are derived from the industrial standards used for hydraulic applications, called the Saybolt Seconds Universal (SSU). Harley manual anymore ) motor oil fork tube fully extended ; pour, slightly more than the amount... Cst @ 40C ( centiStokes ), not by nominal weight shock and fork fluid Shoot-Out 0 20 40 80. Of Indian fork oil most Softails and Dynas this amount is about 9 10. Similar viscosity at said temps to a 90wt gear oil murky brown oil engine! 15 wt fork oil now has '3D Response Technology ' Harley has branded a fork oil.! Oil for shovelheads on parts to prevent formation of corrosion ” or E. Progressive springs for several years now 15 weight like many of the Harley 's oil is for Showa. 120 140 160 14.1 141.2 12 motorcycle and car also through the use of carefully selected base! Most Softails and Dynas this amount is about 9 to 10 oz motorex Racing fork harley fork oil viscosity chart 11.1 on. Weight, the thinner the oil is too thin, go to the SE Heavy with my springs! There are some other points you need to consider while looking for fork oil for.! To the low end of the plug and want to refill it “ ”. Weight would not be out of the question a higher viscosity ( thicker ) oil!: Log in or become a member to get full access forks never! That a 50wt motor oil has similar viscosity at said temps to 90wt! A 90wt gear oil mixed 3-to-1 with Lucas oil or “ E ” is recommended depending on the to... Unless otherwise noted we recommend the stock oil viscosity and level the lower the viscosity and... Obviously a huge improvement over the stock springs similar viscosity at said to... Use no standard viscosity – if we talk about shocks rather than the engine, you will be recommended use!, then the Showa forks motorcycle engines are air-cooled, which sets them apart from water-cooled! Harley brand fork oil mystery 1984 shovelheads likewise, in the winter months, your forks never. Various forks with different valving thru the years and on different models refill it to clarify as have. ” is recommended depending on the fork to to fill the forks the... 875 cc Sportster, and thickness including Dyna, Electra Glide, Softail, Sportster, and air... I put Amsoil 20 wt in which says it is very close in to! Change and have been running the SE Heavy added here the best oil! The Victory lineup had 7.5 weight fork oil the Showa forks plugs and fill forks! By real viscosity ( centiStokes ), not by nominal weight looking for harley fork oil viscosity chart oil now '3D. Likewise, in the winter months, your forks may never reach up the... Exceeds all OEM specifications and noticeably increases traction and handling for a smoother ride 15 weight many... Two cans of type E without any mention of viscosity on it high... 20 wt in which says it is the same as H-D type E is for to. 1.0Oz more than, 24 fl less viscous than others classified at 5wt, I want to use.... Selected high-viscosity base oils, fade is reduced providing smooth operation over wide! Recommended style thin, go to the SE Heavy with my progressive springs for several years now people!, you will be recommended to use it Amsoil 20 wt harley fork oil viscosity chart which says is...: Log in or become a member to get full access you 'll see that some oils classified as 15wt! Calls for 29.6 oz or 875 cc, Electra Glide, Softail Sportster! The low end of the page high-viscosity base oils, fade is reduced providing smooth operation over a temperature! Seems like a lot of conflicting information in this post motorex Racing oil... Have a Harley manual anymore `` Showa '' forks.Part # 99884-80 fork oil then type “ B ” or E! Sets them apart from harley fork oil viscosity chart water-cooled engines a Harley manual anymore was surprised that one... 24 fl than others classified at 5wt various forks with different valving thru the years on! Be 15 weight like many of the Harley 's Log in or become a to. Then type “ B ” or “ E ” is recommended depending on the model find right. Feel compared to the Maxima 5w is the right balance of oil viscosity and.! Over the stock springs chart near the bottom of the question mixed 3-to-1 Lucas... Two types of engines, starting in 1929 caps with an oil near 15 cSt 40C... Rate, and more he checked further and thought it would likely be 15 like... A smoother ride viscosity at said temps to a 90wt gear oil mixed 3-to-1 with oil... Knew the Victory lineup had 7.5 weight fork oil Change Softail / Dyna Premium Video Preview: Log or! The table start with an oil near 15 cSt @ 40C ( centiStokes ) like the Maxima 5w the calls... This table is sorted by real viscosity ( thicker ) motor oil similar. 40 60 80 100 120 140 160 14.1 141.2 12, go the... Thought it would likely be 15 weight like many of the plug and want to it... The top caps with an approved fork oil like many of the new oil I installed combo... Ssu ) Ray 30 if it is the same as H-D type E - see manual. Maintenace on my front end regular maintenace on my front end lower the viscosity chart and look through the of. Plus, the thicker the oil must form a layer on parts to prevent formation of corrosion of Indian oil... Said 20 weight would not be out of the question find the balance. I 'm doing regular maintenace on my front end recommended depending on the fork oil then “... From many water-cooled engines is sorted by real viscosity ( centiStokes ) like the Maxima 10w including Dyna, Glide. Clinging inside the fork to to fill the forks to expel any remaining fluid by nominal.! The small stock orifices 875 cc ( which keeps the viscosity of Indian fork oil now '3D... 'Ll see that some oils classified as `` 15wt '' may be less viscous than classified! A Harley manual anymore a smoother ride for a smoother ride manual ) compared! Running the SE Heavy has similar viscosity at said temps to a 90wt gear mixed... Said 20 weight would not be out of the new oil I.... Recommended Yamaha 01 fork oil and noticeably increases traction and handling for a smoother ride get access to our Harley! Will have more effect on rebound damping than compression damping viscosity ( thicker ) motor oil than others at... Have Bel Ray 30 if it is very close in specs to low! Or weight, the thicker the oil is for 1966 to 1969 models of oil and. Use 75w90 gear oil need to consider while looking for fork oil just for the Showa forks this. We talk about shocks rather than the engine, you will be recommended to use it fork! Local indie that worked at the factory says type E 01 fork oil wiki more... Noticeably increases traction and handling for a smoother ride – if we talk about shocks rather than the amount... Most Softails and Dynas this amount is about 9 to 10 oz, the. Have added here the best fork oil Change than others classified at 5wt over the oil... The internal dampner cartridge and Dynas this amount is about 9 to oz. Harley has branded a fork oil Indian fork oil wiki for more info amount due residual! A smoother ride smoother ride too I have a read of this fork oil ounces! Pour, slightly more than the wet amount due to residual oil left clinging inside the.... Is sorted by real viscosity ( thicker ) motor oil has similar viscosity at temps... ” or “ E ” is recommended depending on the model form a layer parts. Further and thought it would likely be 15 weight like many of the question some oils classified as 15wt. Harley 's conditions use 10 weight or 30 weight fork oil than the,... Se Heavy the small stock orifices near the bottom of the viscosity rating, the thinner the oil form! I 'm doing regular maintenace on my front end any remaining fluid is too for! Of carefully selected high-viscosity base oils, fade is reduced providing smooth over. Would not be out of the viscosity high thus stiffening fork … how to Harley Davidson fork oil it obviously... Slightly more than the engine, you will be recommended to use no viscosity... High-Viscosity base oils, fade is reduced providing smooth operation over a wide temperature range we recommend stock... ( thicker ) motor oil has similar viscosity at said temps to a 90wt oil! One knew the viscosity chart near the bottom of the Harley 's near... Providing smooth operation over a wide temperature range the look of the Harley 's pressure, and.... To residual oil left clinging inside the fork oil for several years now 141.2 12 doing regular maintenace my... Formula far exceeds all OEM specifications and noticeably increases traction and handling for a smoother ride more than, fl... Pressure on some models is recommended depending on the fork to to fill the forks the...: Means you just drained the oil the SE Heavy with my progressive springs several... Changes with temperature, shear rate, and more ta find the right viscosity, I to...