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Leaking oil how to service forks

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If you have not been trained do NOT service these forks.
requires 4 specialty tools, every specification has to be spot on. Very sensitive to oil level in both chambers, easy to make $$$ mistakes. The free piston should be inspected by a trained tech for cracks.

Posted on Apr 04, 2014

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Posted on Jan 02, 2017

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2003 HD sportster - forks don't leak, bottoms out when front brakes applied


You may not have enough oil in the front forks or you may been a heavier viscosity of oil. I'm sorry but I don't have the oil capacity for your "Low Sportster". All I have is for "Hugger" models. They take 10.7oz. "wet" and 12.1 "dry". The difference between "wet" and "dry" is that if you simply drain and refill the front forks, it's call a "wet" oil change. If you disassemble and clean the forks of all oil inside, it's called a "dry" oil change. Contact the service department of your local shop and ask them how much oil goes in the front fork. To change the oil, there is usually a small screw in the trailing side of the lower fork slider down near the axle. Take these out and the oil will drain to a certain degree. Hold the brake while working the forks up and down with your weight to get all the oil that draining will get out of them. If you want all the oil out, you'll have to disassemble the fork tube. I would not do this if the seals are not leaking. Replace the screws in the sliders and then remove the top cap from one tube at the time and refill the tube with the specified amount of oil. Sometimes, the top caps can be difficult to get back in due to the pressure of the large spring in the front fork tubes. You may need a tool to compress the sping. I'm not sure on the "Low" model. I've always managed to the top caps back in without any special tool but I've never done a "Low" model bike. Harley uses what they call their "Type E" fork oil. I do not know what the viscosity of this oil is so I always use PJ-1 30 weight fork oil for most applications. Use only fork oil as any other oil may have a tendency to foam thereby negating any dampening action of the forks. If this doesn't solve your problem, you may want to check into changing the springs in the front forks. Progressive Suspension and others make kits for this.

Good Luck
Steve

Sep 13, 2011 | 2006 Harley Davidson XL 1200 L Sporster...

1 Answer

Front shock oil running all over


Unless you've had your front fork assembly serviced recently, I'd guess you've got blown oil seals in the top of the sliders on your forks. If someone serviced your forks lately, they may have put in too much oil and blown the seals. You'll have to drain the forks, disassemble the fork tube from the lower slider and replace the seal in each leaking tube. Refill the fork tube with the designated about of oil for a "dry" refill. Use this figure because the fork tube was disassembled. When you simply drain the forks without a disassembly, you cannot get all the oil out and the refill quantity is less.

Good Luck
Steve

Aug 06, 2011 | Harley Davidson FLSTC Heritage Softail...

1 Answer

Buell Ulysses XB12X front suspension oil leak. 1) How much oil? 2) type of oil to be used? 3) How to replace oil seals?


The fork service is not for a novice. you can hurt yourself pretty badly with the compressed springs inside of the forks if you release them wrong. You need a copy of the factory service manual. You can download it if you google it. Otherwise it is strongly recommended that you take it to a trained professional.

Mar 07, 2011 | 2007 Buell XB12X Ulysses

1 Answer

My bike has travelled 27000klms should the fork oil be changed,what would you reccomend as to what oil,change frequency is not in the service data


The only time you need to change the fork oil is if the seals are bad and it's been leaking. Or you take them apart for some reason.

Dec 11, 2010 | 2006 Suzuki GSF 1200 Bandit

1 Answer

Tied bike down in ute without using a fork block. Checked bike today and found both forks had leaked oil. I think bike tied down on way home has caused the forks to leak? Have the seals gone? or have they...


It's possible you may have leaked some oil, but first things first, clean the heck out of them and ride it around again to see if you are STILL leaking oil. If you have to top them up, there's a few methods out there, one guy I knew used a meter stick to measure the oil in the forks, but if you are going to be in there, you might as well drain the oil and start over with the correct amount of fluid. I hope this helps a little. Good luck.

Bruno

Nov 08, 2010 | 2008 KTM 450 EXC-R

1 Answer

Fork oil level


Forks can get pretty complicated. If they have been worked on it is not just re-filling with oil to a certain level. That would be the case if the seals leak a bit and all you are doing is adding oil to replace what has gotten past the seals. I am giving you a site where you can download a free factory service manual. Everything on servicing the forks and the rest of the bike is in the manual. There is a 2003 manual on the site. Your 2004 forks are the same as the 2003. All other service procedures are also the same. Go to this site and you can download a free PDF service manual. The site may take up to 20 seconds to load the complete list of manuals. Please rate my answer. Thanks!
www.carlsalter.com/motorcycle-manuals.asp

Nov 22, 2009 | 2004 Yamaha YZ 450 F

1 Answer

Can you tell me how much oil to put in an en500 forks please, Andy


If you never have put for oil into a set of forks, yes you have to check both forks. I would suggest treading lightly. If you have time and a place to block the bike as well as a manual you can do it.
Are you adding oil because the seals are leaking or do you have excessive stiction in the fork? If the seals are leaking, you will have to pull the forks and add new seal and put in exactly the right amount oil.
Do you have air seat or is it a closed fork?
For you en500 you should have a volume of oil in your service manual.

Aug 17, 2009 | 2005 kawasaki EN 500 Vulcan

2 Answers

How can I tell if my Fork tubes take fork tube oil or are Air ride....I don't seem to see the normal drain plugs for the fork tubes.


Most forks take Automatic Transmission oil ("ATF").
Most new motorcycles don't have drain holes for it is almost impossible to remove all of the oil through such an opening.
If the forks aren't leaking and are working, don't disturb them. If they are leaking you will need to remove and service them. This should be only done by a shop or someone who knows how.

Jun 16, 2009 | 1998 kawasaki VN 1500 Vulcan Classic...

2 Answers

2004 honda shadow 600 VLX leaking fork seal bike has 600 miles on it should I replace left and right if only right is leaking.


check first to see if the leaking fork has any rust pitting on the chrome,if it has and its a very small blemish then fettle it off first,and just replace the leaking seal,as the saying goes..if it aint broke dont fix it,if the seals had been in the forks for years and the bike not used then consider replacing both..

Jun 05, 2009 | 1986 Honda VT 1100 C

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