how do you adjust/check air shocks? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 12 (permalink) Old 03-14-2015, 01:41 PM Thread Starter
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rear shock air pressure

Does anyone know what the air pressure is supposed to be? My 750 is bottoming out a little
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post #2 of 12 (permalink) Old 03-14-2015, 02:48 PM
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it's not very much. I can't remember what it is right of the top of my head. but I do know it's not much at all.

how many miles on your bike? are those original shocks? if so, they maybe just plan wore out. or maybe you just need to go on a diet. sorry about that, I just couldn't help myself. just too easy. I'm only joking about the diet.

I'm sure someone will be along really soon with the right #'s. just a thought, did you adjust the shock manually? these shocks have both air and manual adjustments on them. it's nice to have options. I like options.

if it goes vroom or boom, I LIKE IT!

Last edited by ruger; 03-14-2015 at 02:51 PM.
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post #3 of 12 (permalink) Old 03-14-2015, 04:38 PM
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Quote:
Originally Posted by clawwd View Post
Does anyone know what the air pressure is supposed to be? My 750 is bottoming out a little
The pressure should be 10% of the load you are putting onto the bike. That would be your weight and any additional things you add but this is the formula for when the shocks are in good condition. Over time the seals may have dried and/rotted away etc. I have been told to add air only through a hand pump to avoid over filling and causing a problem. Also the springs that assist the shocks may be weakened.

Do a search here on the forum of the topic and you will find a vast amount of information on that particular subject. Also looking we are looking for your introduction post under the Newbie Check-In heading where you can tell us a bit about your riding/wrenching experience and your location. That is always helpful when you are needing some assistance as it helps regular forum members know what kind of advice to give you. If someone knows you are just starting out then they wouldn't be telling you to tear the entire motor apart. Also knowing where you are located lets others possibly offer hands on assistance if needed.

and always remember, "Ride until you rot!"
**Really not sure if the Big "C" is back right now
but having to face the fact that this is a lifetime routine
going forward. Five operations done and it still continues.

Tom
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New ride: 2009 Victory Vision Arlen Ness Signature Series
4507 miles

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post #4 of 12 (permalink) Old 03-14-2015, 04:49 PM
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this might help......
https://www.vn750.com/forum/showthread.php?t=6409

if it goes vroom or boom, I LIKE IT!
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post #5 of 12 (permalink) Old 03-14-2015, 11:45 PM
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Less I was totally packed for a trip I put the shocks on #4 setting and used 20 pounds of pressure. I'm a large country boy and that did good for me. I ride the ruff backroads a lot. Any more air than that just jacked the bike up.
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post #6 of 12 (permalink) Old 03-15-2015, 04:39 PM
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Quote:
Originally Posted by ruger View Post
Thank you, Ruger. I remembered reading through that thread some time back but did not get a chance to search for it myself.

and always remember, "Ride until you rot!"
**Really not sure if the Big "C" is back right now
but having to face the fact that this is a lifetime routine
going forward. Five operations done and it still continues.

Tom
Vulcan 2000
New ride: 2009 Victory Vision Arlen Ness Signature Series
4507 miles
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post #7 of 12 (permalink) Old 03-15-2015, 05:49 PM
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how do you adjust/check air shocks?

Like it say I'm a new owner it's a 92 750 and don't know to check or adjust the air shocks could use a little knowledge on the shock systems so I don't f anything up..
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post #8 of 12 (permalink) Old 03-15-2015, 06:03 PM
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Get the download manual from Kanuck's signature, section 12-10 says 0-43psi, depending on weight load and road conditions.

Front forks use a lot less on the max. pressure, but can also run zero. later models don't have the air forks.

You need to use a hand pump and not a compressor, too easy to blow the seals out.

Damping adjustment 1-4 is, 1- bouncy, 4-firm.

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__________________________________________________ ____________
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Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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post #9 of 12 (permalink) Old 03-15-2015, 06:09 PM
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Manual shows 0-43psi for the rear. Air front forks (early models) only go to something like 7psi.

The soft damper setting for the rear, 1, would let mine bottom out on certain bumps, but 4 got to be too firm, I settled on 3.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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post #10 of 12 (permalink) Old 03-15-2015, 07:33 PM
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Aren't the shocks filled with nitrogen from the factory or am I mistaken?

"Katie"
2002 VN 750, stock except for accessories
Mustang seat
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About 25k miles
All drive train maintenance performed, drive shaft coupler replaced
Way more experienced at pulling VN 750 carbs than I ever wanted to be.
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