Having shock issues on rear - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 10 (permalink) Old 06-15-2015, 10:58 PM Thread Starter
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Having shock issues on rear

My bike started to feel very unsteady leaning into corners today. I checked the rear shock pressure and there was oil present in the valves but no air pressure. I then tried to pump the shocks up a little bit and it didn't seem to take but one or two strokes of the hand pump before it was completely unable to be pushed any further and that was at 22 pounds of pressure. Is that normal for it to take such a small amount of pressure before being full and should I be concerned with the oil at the valves which was not leaking out but present. I'm unsure why I'm not keeping air pressure in the shock today and why it decided to go low and not register air pressure however I recently changed it to setting four and have been riding with a passenger so I'm wondering if I blew something out or stressed them out. They are both acting the same way both have oil present at the valve and both have zero pressure and both only accept two pumps from a hand pump before it's hard to go any further and it says 22 pounds of pressure.
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post #2 of 10 (permalink) Old 06-16-2015, 07:26 AM
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they hold very little air. depending on the pump, it may only be 2 or 3 strokes.

oil at the valve, not a worry, there is no diaphragm between the oil and air.

I ran my rears with around 26-30 lbs in them, but I didn't use a hand pump to fill (I lived dangerously, use nitrogen from a local auto shop).

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post #3 of 10 (permalink) Old 06-16-2015, 09:13 AM
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Are you saying they are leaking air?

I filled mine with a small electric pump, but had to put in 8-10 pounds over what I wanted cause removing the pressure gauge would get them to lose that.

The stock shocks are kinda crappy to begin with, you might want to consider replacing them with something better...

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post #4 of 10 (permalink) Old 06-16-2015, 09:37 AM
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how do I increase the pressure in the rear shock? My wife and I were riding together the other day and we hit a bump and the center stand scraped. Need to adjust the shock but not sure how.

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post #5 of 10 (permalink) Old 06-16-2015, 10:17 AM
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Quote:
Originally Posted by mrseedsower View Post
how do I increase the pressure in the rear shock? My wife and I were riding together the other day and we hit a bump and the center stand scraped. Need to adjust the shock but not sure how.
Well if you have the stock shocks, there's a very visable a schrader valve sticking out near the top. If you don't have stock shocks, it won't be there....

Use a hand pump or small electric pump, don't use air from a large compressor as you can easily overfill and blow out the seals.

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post #6 of 10 (permalink) Old 06-16-2015, 11:26 AM
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Quote:
Originally Posted by mrseedsower View Post
how do I increase the pressure in the rear shock? My wife and I were riding together the other day and we hit a bump and the center stand scraped. Need to adjust the shock but not sure how.
The chrome sleeve covering the spring at the top will rotate to change settings (numbers 1-4 on top) for rebound/compression damping. 1 is the most soft, 4 the most firm.

This adjustment is in addition to to air pressure.

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post #7 of 10 (permalink) Old 09-28-2015, 09:58 AM
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After sitting for several years, in getting my 750 A13 back on the road, after the first spin around the neighborhood I found that the right rear shock is dripping oil. Does anyone know if they have replaceable seals? Has anyone ever replaced (rebuilt) theirs, or are they shot out at that point?

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post #8 of 10 (permalink) Old 09-28-2015, 04:09 PM
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Stock shocks are not rebuildable.

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post #9 of 10 (permalink) Old 09-29-2015, 02:33 AM
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Quote:
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Stock shocks are not rebuildable.
Thanks, I ended up finding a used set on eBay. Probably for less than the rebuild kit would have cost anyways.

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post #10 of 10 (permalink) Old 09-29-2015, 10:03 AM
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Quote:
Originally Posted by A6ULdv8 View Post
Thanks, I ended up finding a used set on eBay. Probably for less than the rebuild kit would have cost anyways.
If you found a rebuild kit for something not rebuildable I think that would not be money well spent
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