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post #1 of 13 (permalink) Old 10-09-2011, 10:15 PM Thread Starter
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Rear shocks

I have stock rear shocks with the 1-4 dial. However, the dial makes no difference in how far the bike sinks when I sit on it. I can set it to 1 or 4 but it doesn't seem any different. Is something worn out in the shock?

-Robert
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post #2 of 13 (permalink) Old 10-09-2011, 11:03 PM
If only it had 6th gear..
 
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I didn't find it made any difference on mine either but i think its more to do with the absorption rather than height. May be wrong but i dont think they're for height adjustment.

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post #3 of 13 (permalink) Old 10-10-2011, 06:53 AM
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It does put the spring under more tension and make it a bit stiffer for a heavier rider or with a passenger... If you are still bottoming out check the air, that will make them even stronger... I have never ran over 30 psi in mine, the main thing is to use a shock pump or you can get it done with a bicycle fork pump, they hold such a small amount of air that the least bit of air loss when removing the pump will deflate a lot of pressure...
Have a good one...Old Dog...

Southern Central Tennessee.......
Now on the Dark Side......
Girl's Bike 09 Sporty xl 1200 Custom...33k + & clickin......
Sportster Owner/Rider since age 72...lol... Rider since Simplex...???
09-xl1200 "C" Vivid Black, Cast wheels w/19" Frt., SE-Stage 1+, X14iEDs...
MicroTach +, Higher wider H-bars, GPS Mt., Mustach bar Hwy. pegs...
Viking Shock cutout Saddlebags, Rear Mt. Signal Lt. Kit, Fork Brace...
RoadKing Air Shocks, Mustang Seat, Progressive Fork Springs...
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post #4 of 13 (permalink) Old 10-10-2011, 04:07 PM
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like i said in a earlier post..........do what you want with these crappy stock shocks,,,,it will not make any difference. replacement shocks is the answer,,but that costs $$$,,something not a lot have got these days !!.

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new filters(foam type)
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post #5 of 13 (permalink) Old 10-10-2011, 04:34 PM
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The settings on the shock adjust rebound dampening only....NOT preload, which is what changes ride height, (Sorry OD, but you're wrong)
You can adjust shock preload some by adding air- but this is not true "spring preload" as found on other shocks.

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post #6 of 13 (permalink) Old 10-10-2011, 04:52 PM
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Quote:
Originally Posted by RobertGary1 View Post
I have stock rear shocks with the 1-4 dial. However, the dial makes no difference in how far the bike sinks when I sit on it. I can set it to 1 or 4 but it doesn't seem any different. Is something worn out in the shock?

-Robert
The 1-4 dial on the rear shocks is to adjust the dampening, or return to extension on rebound. It has nothing to do with compression of the shock or adjustment of shock length with rider in the seat. 1 is softest, 4 is stiffest.

To adjust for softer or stiffer compression add or release air pressure from shock.
As mentioned previously use a shock or fork pump, preferably with a zero loss fitting to the valve.
Usable range is 0-43 psi.
Max is 71 psi.

Clymer manual suggestion for a 150 lb rider including load is #2 damper setting and atmospheric pressure (0 psi).

Heavier riders will set dampers higher, and others have suggested pressuring the shocks to 10% of the riders total weight and load. ie. 300 lb rider and load = 30 psi in shock.

And rev it up is right, according to several other members whose opinion I respect, these shocks are pretty crappy.
Progressive shocks and front fork springs are the way to go for an improved ride!!

http://www.progressivesuspension.com...inemetric.html
http://www.progressivesuspension.com...41&modelID=452

Gordon

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Purchased May 16, 2008
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Last edited by OlHossCanada; 10-10-2011 at 05:01 PM.
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post #7 of 13 (permalink) Old 10-10-2011, 04:56 PM
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Quote:
Originally Posted by Knifemaker View Post
The settings on the shock adjust rebound dampening only....NOT preload, which is what changes ride height, (Sorry OD, but you're wrong)
You can adjust shock preload some by adding air- but this is not true "spring preload" as found on other shocks.
Hey, I'm old enough to be wrong every now and again... Actually I was thinking more about the air anyway... I forgot most springs get softer when compressed... But I thought I was wrong once before but I was mistaken...lol...
Have a good one...Old Dog...

Southern Central Tennessee.......
Now on the Dark Side......
Girl's Bike 09 Sporty xl 1200 Custom...33k + & clickin......
Sportster Owner/Rider since age 72...lol... Rider since Simplex...???
09-xl1200 "C" Vivid Black, Cast wheels w/19" Frt., SE-Stage 1+, X14iEDs...
MicroTach +, Higher wider H-bars, GPS Mt., Mustach bar Hwy. pegs...
Viking Shock cutout Saddlebags, Rear Mt. Signal Lt. Kit, Fork Brace...
RoadKing Air Shocks, Mustang Seat, Progressive Fork Springs...

Last edited by Old Dog; 10-10-2011 at 05:15 PM.
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post #8 of 13 (permalink) Old 10-10-2011, 08:43 PM
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Quote:
Originally Posted by Old Dog View Post
Hey, I'm old enough to be wrong every now and again... Actually I was thinking more about the air anyway... I forgot most springs get softer when compressed... But I thought I was wrong once before but I was mistaken...lol...
Have a good one...Old Dog...
Being wrong now and then is just part of being human. My dad always said "if you don't make a mistake now and then....something is wrong with you."

There are shocks that do not use springs at all, but only air. (I had a set on my 76 El Camino)

The Vulcan shocks only use air a suppliment to the springs...which were too stiff in this application in my opinion.

Springs also waeken and sag over time, and given the age of the average Vulcan here.... Most are past their lifespans.

New shocks... Good ones ... Are not cheap. But can make HUGE differences in the way a bike functions. Racing suspensions cost thousands of dollars, and just halfway decent shocks for this bike are around 400 bucks. It's not a big shock ( pun intended ) that Kawasaki did not spend alot on the Vulcans suspension package.

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post #9 of 13 (permalink) Old 10-10-2011, 11:45 PM
If only it had 6th gear..
 
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Yeah I'm not really impressed with the suspension. Can't afford to buy new front and rears but I thought about doing the ebay thing for alternate rears. Any recommendations? Sporster shocks on the rear etc?

Dave

Mods:
Jetted, shaved & coastered
Home made under-tank single filter
Converted ACCT's to manual (thanks wib714)
Dual vac lines on petcock (my cure for ticking)
LED tail/plate lights
Relocated helmet lock to license plate

Added stuff:
Customized hard bags w/ lights
Chrome levers
Hellcat windscreen
LED running lights
Home made 'Vita-Volt' meter
Foot rests on engine guard
Tunes

Hmm....she was on the back when we left.... ??
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post #10 of 13 (permalink) Old 10-11-2011, 05:45 AM
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Quote:
Originally Posted by DavesVulster View Post
Yeah I'm not really impressed with the suspension. Can't afford to buy new front and rears but I thought about doing the ebay thing for alternate rears. Any recommendations? Sporster shocks on the rear etc?
Well, Sportster shocks are noted for not being very good shocks either, that I don't think would be an upgrade...
However we Sportster riders do have an alternative, the big boys on their geezer glides with all the money tend to buy the high dollar shocks for their big rides and sell the very good Road King air shocks on CL or fleabay for anywhere from $20-$60, I found a brand new take off set on CL for mine for $40, and within 25 mi. (no shipping) met him 1/2 way and viola...
They were +/-3/4" longer and in my opinion actually helped the handling in the twisties, although I don't think that is the way it is supposed to work...
PS-here are a couple of reads to help understand suspension a bit better...
http://www.ntnoa.org/suspension_preload.htm
http://www.rc-truckncar-tuning.com/shock-damping.html
Have a good one...Old Dog...

Southern Central Tennessee.......
Now on the Dark Side......
Girl's Bike 09 Sporty xl 1200 Custom...33k + & clickin......
Sportster Owner/Rider since age 72...lol... Rider since Simplex...???
09-xl1200 "C" Vivid Black, Cast wheels w/19" Frt., SE-Stage 1+, X14iEDs...
MicroTach +, Higher wider H-bars, GPS Mt., Mustach bar Hwy. pegs...
Viking Shock cutout Saddlebags, Rear Mt. Signal Lt. Kit, Fork Brace...
RoadKing Air Shocks, Mustang Seat, Progressive Fork Springs...

Last edited by Old Dog; 10-11-2011 at 02:48 PM.
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