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Old 11-30-2012, 01:51 PM   #91 (permalink)
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Here is the best article on "damping" I have read in awhile;
http://www.blackartdesigns.com/id4.html
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Old 11-30-2012, 06:11 PM   #92 (permalink)
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Awesome!

Quote:
Originally Posted by cts1950 View Post
There has been some discussion on changing oil in your shocks. By changing the weight of oil you can adjust the dampening. This is done all the time in racing bikes and quads. I changed the oil in my own bikes shocks and found it to be quite easy and the results were well worth it. I had problems with bottoming out all the time even with the air pressure as high as I dare putting in to them as much as 50 psi. After the change of oil to a 10 weight only 12 to 15 psi was needed even with a heavily loaded ultra. I made a simple press out of materials I bought at Home Depot about 20$ and is makes the oil change about a 30 minute job. My adapter made from a 1/8 pipe nipple and a 45 street el and a spark plug boot and small funnel make up the rest of the parts needed.
1 With the shock removed and brass fitting out of it install the shock upside down with the adapter pipe installed, It takes about 5 complete strokes on the handle to empty the shock of its old dirty oil about 10 oz.
2 Turn the empty shock over and put the funnel into the spark plug boot and measure out 10 oz of clean suspension oil into your measuring cup I used a ratio rite.
3 While pumping with short strokes on the press add the oil into the funnel and do not over fill because by pumping you will be burping out the air and sucking the oil into the shock.
4 when the shock is filled with no more than 10 oz of oil put the air fitting back on the shock with thread sealant and reinstall on the bike. You are now ready to do the same for the second shock.


pictures can be seen at http://s841.photobucket.com/albums/z...view=slideshow
How about adding the dimensions of th epress you made and what's needed for it?

It's perfect!@
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Old 03-31-2014, 05:35 PM   #93 (permalink)
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TexasBowhunter: You still with us here on the forum? Have you continued to experiment on the stock shocks, and have any new info on the results?
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Old 04-01-2014, 09:09 AM   #94 (permalink)
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I did the oil change on my '06 RG. I went with 30 wt oil in both the shocks and forks. Rode and handled a whole lot better.

Now I've got a '13 RGU and am looking into doing the same thing. Just got to take the time to get it done.
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Old 04-23-2014, 09:29 PM   #95 (permalink)
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Good read thanks for the info
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Old 04-24-2014, 07:07 PM   #96 (permalink)
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Long thread, after page 5 I jumped to the end. I took one rear shock of my scooter the other day and the rear suspension shortened up about an inch. Got me thinking. If I took off both shocks and remounted one upside down with the little plumbing fitting in it, couldn't I just alternately sit down and stand up to pump out the old oil, then mount the shock right side up and repeat the sit-stand routine with a hose in a shock oil container until it "inhaled the correct amount and not bother building the rig to pump the shock? Intuitively, I think it would work. I will try it on mine soon when I catch up with other chores. Also, I hope no one looks in the window while this is going on a gets the wrong idea about my relationship with my bike.
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Old 04-25-2014, 08:37 AM   #97 (permalink)
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That's how I did mine. A bit messey but got the job done.
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Have you thanked a veteran lately for the freedoms you enjoy today?

'13 Road Glide Ultra in Midnight Pearl.

Traded in.
'06 Road Glide
95" w/ 10.5: 1 SE forged pistons
Dan Vance Racing Port/polish raised port heads
Andrews 37G gear drive cam
1.7:1 Roller rockers
50MM SE TBI
Hypercharger
Klock Werks Puffler mufflers on true dual head pipes.
Custom body work and paint. Kopper Penney Pearl faded into black.
SAE corrected 101.43 HP/ 104.39 TQ
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Old 04-27-2014, 07:01 PM   #98 (permalink)
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Amsoil shock therapy #10 & http://www.harborfreight.com/mityvac...ump-39522.html & your all set.
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Old 12-09-2014, 04:12 PM   #99 (permalink)
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Thumbs up Good work

I did this to my 06 ultra, better than buying new shocks. It changes the bike to a much better ride and I sure wonder why Harley didnt put 10 weight oil in these shocks to start with. Make this device at home guys and you will have a new bike rest assured. I am an Aussie and we ride on goat tracks here for the most part and they sure help with rough roads and make the ride how it really should have been out of the factory. Good work!!

Last edited by aussieHarleyguy; 12-09-2014 at 04:22 PM. Reason: spelling
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Old 12-10-2014, 08:46 PM   #100 (permalink)
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Interesting article, I read this before but took interest in it again since the right rear shock on my 2015 road King starting leaking the oil out of the seal at 200 miles. I have make the mistake of removing Harley air shocks and laying them on their side, the oil will come out pretty darn good all on it's own that way. I may consider changing the shocks to 10#. I considered the premium hand adjustable ones but have heard many times they are NOT plug and play, you need to adjust them for best perfomance any time you add a passenger. According to the Harley service manual, any loss of oil from your shocks requires replacing them period. Makes ya wonder why.
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Old 12-11-2014, 10:39 AM   #101 (permalink)
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Quote:
Originally Posted by gunnysgt View Post
Interesting article, I read this before but took interest in it again since the right rear shock on my 2015 road King starting leaking the oil out of the seal at 200 miles. I have make the mistake of removing Harley air shocks and laying them on their side, the oil will come out pretty darn good all on it's own that way. I may consider changing the shocks to 10#. I considered the premium hand adjustable ones but have heard many times they are NOT plug and play, you need to adjust them for best perfomance any time you add a passenger. According to the Harley service manual, any loss of oil from your shocks requires replacing them period. Makes ya wonder why.
I think that is just to make more money they can be rebulit.
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Old 12-17-2014, 12:50 AM   #102 (permalink)
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I did the oil change in my shocks....

just to find out that the poor improvement it did suggested me to CHANGE THE SHOCKS AROUND MY OIL instead....

so I bought a nice pair of ohlins and since then I'm ( quite ) a happy camper...

:-)

Last edited by ace48it; 12-17-2014 at 11:08 AM.
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Old 12-21-2014, 01:00 PM   #103 (permalink)
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Quote:
Originally Posted by MaineUltraClassic View Post
Went to the hardware store, picked up a threaded barbed fitting to fit the shock, a short piece of tubing, and a funnel. Pumped the shock as I filled the funnel with the new oil. Worked like a charm..........now I just need some dry weather and no tornado watch to take it for a ride and see how it feels.

Tomorrow will be the fork oil's turn for a change.........been a couple of years, it's due.

Steve
Steve, Just finished my forks when I stumbled on this thread. Just to verify, the manual says that the shocks aren't serviceable on my 01 Road King. Are the shocks different on your ride or are you describing the way to service "unserviceable" shocks? Thanks!!
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Old 12-26-2014, 05:21 PM   #104 (permalink)
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Some notes from a beginner

OK, Just did this and there are a few things that I didn't see in the other posts that might be helpful.

1 - You can pump out the shocks or I just left them hanging for about 24 hours and they drained out. You can shake them and see if there is anything left after that but it worked well for me. 11 oz from each.
2 - I purchased a 1/8th pipe tread barbed fitting to screw in to the air line inlet so that I could more easily install a hose. It is NOT a standard thread and you'll ruin it if you try to use a standard thread fitting. Bring the air inlet fitting with you to a good hardware store and they'll find the part you are looking for.
3 - To put the oil back in I measured out 13 oz into my brake bleeder/pressure device and pushed in 11 oz. Realized about half way through that I needed to account for the fact that you won't empty the entire container. This is rank beginner stuff but still.
4 - When it comes to reinstall the shock I was adjusting the hight of the bike to get the shock holes to line up and managed to tear the shock boot. UGH! The part is a honda part Number H52611-MN5-003. The next time I set the bike hight (and the distance between the mounting bolt holes) before installing the shock boot.

This went much better than I thought, glad I did it, the oil in the shock was filthy (44k miles).
Good luck!
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Old 12-27-2014, 08:00 AM   #105 (permalink)
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shocks

it;s amazin what a man can come up with ,thats usin that brain for sure
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